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Finding the Fourth Proportional to 664,545,987.45, 996,818,981.18 and 664,545,987.45

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Solution

The fourth proportional to 664,545,987.45, 996,818,981.18 and 664,545,987.45 is: 996,818,981.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,545,987.45 : 996,818,981.18 = 664,545,987.45 : x
  2. Step 2: Convert to fraction form
    664,545,987.45/996,818,981.18 = 664,545,987.45/x
  3. Step 3: Cross multiply
    664,545,987.45x = 996,818,981.18 × 664,545,987.45
  4. Step 4: Simplify right side
    664,545,987.45x = 662,432,054,153,843,328
  5. Step 5: Solve for x
    x = 662,432,054,153,843,328/664,545,987.45
  6. Step 6: Final answer
    x = 996,818,981.18

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.