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Finding the Fourth Proportional to 387,515.76, 580,732.34 and 187,783.13

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Solution

The fourth proportional to 387,515.76, 580,732.34 and 187,783.13 is: 281,412.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,515.76 : 580,732.34 = 187,783.13 : x
  2. Step 2: Convert to fraction form
    387,515.76/580,732.34 = 187,783.13/x
  3. Step 3: Cross multiply
    387,515.76x = 580,732.34 × 187,783.13
  4. Step 4: Simplify right side
    387,515.76x = 109,051,732,654.85
  5. Step 5: Solve for x
    x = 109,051,732,654.85/387,515.76
  6. Step 6: Final answer
    x = 281,412.38

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1.5x scale

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.