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Finding the Fourth Proportional to 865,611.51, 1,194,605.74 and 478,418.60

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Solution

The fourth proportional to 865,611.51, 1,194,605.74 and 478,418.60 is: 660,251.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,611.51 : 1,194,605.74 = 478,418.60 : x
  2. Step 2: Convert to fraction form
    865,611.51/1,194,605.74 = 478,418.60/x
  3. Step 3: Cross multiply
    865,611.51x = 1,194,605.74 × 478,418.60
  4. Step 4: Simplify right side
    865,611.51x = 571,521,605,682.76
  5. Step 5: Solve for x
    x = 571,521,605,682.76/865,611.51
  6. Step 6: Final answer
    x = 660,251.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.