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Finding the Fourth Proportional to 717,318.90, 989,902.96 and 430,843.77

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Solution

The fourth proportional to 717,318.90, 989,902.96 and 430,843.77 is: 594,566.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,318.90 : 989,902.96 = 430,843.77 : x
  2. Step 2: Convert to fraction form
    717,318.90/989,902.96 = 430,843.77/x
  3. Step 3: Cross multiply
    717,318.90x = 989,902.96 × 430,843.77
  4. Step 4: Simplify right side
    717,318.90x = 426,493,522,143.45
  5. Step 5: Solve for x
    x = 426,493,522,143.45/717,318.90
  6. Step 6: Final answer
    x = 594,566.13

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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.