Home / 1,520.49-2,280.30-424.61

Finding the Fourth Proportional to 1,520.49, 2,280.30 and 424.61

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Solution

The fourth proportional to 1,520.49, 2,280.30 and 424.61 is: 636.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,520.49 : 2,280.30 = 424.61 : x
  2. Step 2: Convert to fraction form
    1,520.49/2,280.30 = 424.61/x
  3. Step 3: Cross multiply
    1,520.49x = 2,280.30 × 424.61
  4. Step 4: Simplify right side
    1,520.49x = 968,226.78
  5. Step 5: Solve for x
    x = 968,226.78/1,520.49
  6. Step 6: Final answer
    x = 636.79

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Double scale
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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.