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Finding the Fourth Proportional to 620,697,976.20, 930,972,314.70 and 257,154,424.20

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Solution

The fourth proportional to 620,697,976.20, 930,972,314.70 and 257,154,424.20 is: 385,700,709.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,697,976.20 : 930,972,314.70 = 257,154,424.20 : x
  2. Step 2: Convert to fraction form
    620,697,976.20/930,972,314.70 = 257,154,424.20/x
  3. Step 3: Cross multiply
    620,697,976.20x = 930,972,314.70 × 257,154,424.20
  4. Step 4: Simplify right side
    620,697,976.20x = 239,403,649,532,819,712
  5. Step 5: Solve for x
    x = 239,403,649,532,819,712/620,697,976.20
  6. Step 6: Final answer
    x = 385,700,709.06

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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.