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Finding the Fourth Proportional to 707,074,281.84, 975,792,929.04 and 393,808,635.12

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Solution

The fourth proportional to 707,074,281.84, 975,792,929.04 and 393,808,635.12 is: 543,472,859.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,074,281.84 : 975,792,929.04 = 393,808,635.12 : x
  2. Step 2: Convert to fraction form
    707,074,281.84/975,792,929.04 = 393,808,635.12/x
  3. Step 3: Cross multiply
    707,074,281.84x = 975,792,929.04 × 393,808,635.12
  4. Step 4: Simplify right side
    707,074,281.84x = 384,275,681,544,989,376
  5. Step 5: Solve for x
    x = 384,275,681,544,989,376/707,074,281.84
  6. Step 6: Final answer
    x = 543,472,859.10

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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.