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Finding the Fourth Proportional to 358,458, 537,687 and 124,986

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Solution

The fourth proportional to 358,458, 537,687 and 124,986 is: 187,479

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,458 : 537,687 = 124,986 : x
  2. Step 2: Convert to fraction form
    358,458/537,687 = 124,986/x
  3. Step 3: Cross multiply
    358,458x = 537,687 × 124,986
  4. Step 4: Simplify right side
    358,458x = 67,203,347,382
  5. Step 5: Solve for x
    x = 67,203,347,382/358,458
  6. Step 6: Final answer
    x = 187,479

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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.