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Finding the Fourth Proportional to 911,839,677.90, 1,258,339,831.29 and 494,151,962.10

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Solution

The fourth proportional to 911,839,677.90, 1,258,339,831.29 and 494,151,962.10 is: 681,930,290.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,839,677.90 : 1,258,339,831.29 = 494,151,962.10 : x
  2. Step 2: Convert to fraction form
    911,839,677.90/1,258,339,831.29 = 494,151,962.10/x
  3. Step 3: Cross multiply
    911,839,677.90x = 1,258,339,831.29 × 494,151,962.10
  4. Step 4: Simplify right side
    911,839,677.90x = 621,811,096,620,536,448
  5. Step 5: Solve for x
    x = 621,811,096,620,536,448/911,839,677.90
  6. Step 6: Final answer
    x = 681,930,290.70

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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.