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Finding the Fourth Proportional to 638,842,454.40, 881,605,244.16 and 345,487,022.40

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Solution

The fourth proportional to 638,842,454.40, 881,605,244.16 and 345,487,022.40 is: 476,773,527.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,842,454.40 : 881,605,244.16 = 345,487,022.40 : x
  2. Step 2: Convert to fraction form
    638,842,454.40/881,605,244.16 = 345,487,022.40/x
  3. Step 3: Cross multiply
    638,842,454.40x = 881,605,244.16 × 345,487,022.40
  4. Step 4: Simplify right side
    638,842,454.40x = 304,583,170,737,063,360
  5. Step 5: Solve for x
    x = 304,583,170,737,063,360/638,842,454.40
  6. Step 6: Final answer
    x = 476,773,527.87

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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.