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Finding the Fourth Proportional to 387,374.85, 534,627.23 and 217,641.78

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Solution

The fourth proportional to 387,374.85, 534,627.23 and 217,641.78 is: 300,373.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,374.85 : 534,627.23 = 217,641.78 : x
  2. Step 2: Convert to fraction form
    387,374.85/534,627.23 = 217,641.78/x
  3. Step 3: Cross multiply
    387,374.85x = 534,627.23 × 217,641.78
  4. Step 4: Simplify right side
    387,374.85x = 116,357,220,885.46
  5. Step 5: Solve for x
    x = 116,357,220,885.46/387,374.85
  6. Step 6: Final answer
    x = 300,373.71

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1.5x scale

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.