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Finding the Fourth Proportional to 390,869.56, 586,337.22 and 124,667.92

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Solution

The fourth proportional to 390,869.56, 586,337.22 and 124,667.92 is: 187,012.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,869.56 : 586,337.22 = 124,667.92 : x
  2. Step 2: Convert to fraction form
    390,869.56/586,337.22 = 124,667.92/x
  3. Step 3: Cross multiply
    390,869.56x = 586,337.22 × 124,667.92
  4. Step 4: Simplify right side
    390,869.56x = 73,097,441,635.98
  5. Step 5: Solve for x
    x = 73,097,441,635.98/390,869.56
  6. Step 6: Final answer
    x = 187,012.37

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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.