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Finding the Fourth Proportional to 390,861.42, 586,285.97 and 124,620.14

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Solution

The fourth proportional to 390,861.42, 586,285.97 and 124,620.14 is: 186,928.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,861.42 : 586,285.97 = 124,620.14 : x
  2. Step 2: Convert to fraction form
    390,861.42/586,285.97 = 124,620.14/x
  3. Step 3: Cross multiply
    390,861.42x = 586,285.97 × 124,620.14
  4. Step 4: Simplify right side
    390,861.42x = 73,063,037,206.19
  5. Step 5: Solve for x
    x = 73,063,037,206.19/390,861.42
  6. Step 6: Final answer
    x = 186,928.24

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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.