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Finding the Fourth Proportional to 390,872.56, 586,341.72 and 124,670.92

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Solution

The fourth proportional to 390,872.56, 586,341.72 and 124,670.92 is: 187,016.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,872.56 : 586,341.72 = 124,670.92 : x
  2. Step 2: Convert to fraction form
    390,872.56/586,341.72 = 124,670.92/x
  3. Step 3: Cross multiply
    390,872.56x = 586,341.72 × 124,670.92
  4. Step 4: Simplify right side
    390,872.56x = 73,099,761,666.78
  5. Step 5: Solve for x
    x = 73,099,761,666.78/390,872.56
  6. Step 6: Final answer
    x = 187,016.87

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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.