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Finding the Fourth Proportional to 390,751.62, 586,121.02 and 124,508.52

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Solution

The fourth proportional to 390,751.62, 586,121.02 and 124,508.52 is: 186,760.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,751.62 : 586,121.02 = 124,508.52 : x
  2. Step 2: Convert to fraction form
    390,751.62/586,121.02 = 124,508.52/x
  3. Step 3: Cross multiply
    390,751.62x = 586,121.02 × 124,508.52
  4. Step 4: Simplify right side
    390,751.62x = 72,977,060,741.09
  5. Step 5: Solve for x
    x = 72,977,060,741.09/390,751.62
  6. Step 6: Final answer
    x = 186,760.74

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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.