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Finding the Fourth Proportional to 708,800,026.56, 978,144,073.92 and 391,260,356.16

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Solution

The fourth proportional to 708,800,026.56, 978,144,073.92 and 391,260,356.16 is: 539,939,312.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,800,026.56 : 978,144,073.92 = 391,260,356.16 : x
  2. Step 2: Convert to fraction form
    708,800,026.56/978,144,073.92 = 391,260,356.16/x
  3. Step 3: Cross multiply
    708,800,026.56x = 978,144,073.92 × 391,260,356.16
  4. Step 4: Simplify right side
    708,800,026.56x = 382,708,998,737,732,608
  5. Step 5: Solve for x
    x = 382,708,998,737,732,608/708,800,026.56
  6. Step 6: Final answer
    x = 539,939,312.07

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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.