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Finding the Fourth Proportional to 639,551,116.80, 959,774,572.80 and 410,078,246.40

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Solution

The fourth proportional to 639,551,116.80, 959,774,572.80 and 410,078,246.40 is: 615,404,560.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,551,116.80 : 959,774,572.80 = 410,078,246.40 : x
  2. Step 2: Convert to fraction form
    639,551,116.80/959,774,572.80 = 410,078,246.40/x
  3. Step 3: Cross multiply
    639,551,116.80x = 959,774,572.80 × 410,078,246.40
  4. Step 4: Simplify right side
    639,551,116.80x = 393,582,673,753,133,120
  5. Step 5: Solve for x
    x = 393,582,673,753,133,120/639,551,116.80
  6. Step 6: Final answer
    x = 615,404,560.19

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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.