Home / 1,487.20-2,230.92-621.52

Finding the Fourth Proportional to 1,487.20, 2,230.92 and 621.52

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Solution

The fourth proportional to 1,487.20, 2,230.92 and 621.52 is: 932.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,487.20 : 2,230.92 = 621.52 : x
  2. Step 2: Convert to fraction form
    1,487.20/2,230.92 = 621.52/x
  3. Step 3: Cross multiply
    1,487.20x = 2,230.92 × 621.52
  4. Step 4: Simplify right side
    1,487.20x = 1,386,561.40
  5. Step 5: Solve for x
    x = 1,386,561.40/1,487.20
  6. Step 6: Final answer
    x = 932.33

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1.5x scale

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.