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Finding the Fourth Proportional to 442,990.62, 612,126.72 and 315,444.78

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Solution

The fourth proportional to 442,990.62, 612,126.72 and 315,444.78 is: 435,883.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,990.62 : 612,126.72 = 315,444.78 : x
  2. Step 2: Convert to fraction form
    442,990.62/612,126.72 = 315,444.78/x
  3. Step 3: Cross multiply
    442,990.62x = 612,126.72 × 315,444.78
  4. Step 4: Simplify right side
    442,990.62x = 193,092,178,522.52
  5. Step 5: Solve for x
    x = 193,092,178,522.52/442,990.62
  6. Step 6: Final answer
    x = 435,883.22

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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.