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Finding the Fourth Proportional to 387,660.60, 581,490.90 and 200,729.40

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Solution

The fourth proportional to 387,660.60, 581,490.90 and 200,729.40 is: 301,094.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,660.60 : 581,490.90 = 200,729.40 : x
  2. Step 2: Convert to fraction form
    387,660.60/581,490.90 = 200,729.40/x
  3. Step 3: Cross multiply
    387,660.60x = 581,490.90 × 200,729.40
  4. Step 4: Simplify right side
    387,660.60x = 116,722,319,462.46
  5. Step 5: Solve for x
    x = 116,722,319,462.46/387,660.60
  6. Step 6: Final answer
    x = 301,094.10

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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.