Home / 1,520.55-2,280.36-424.65

Finding the Fourth Proportional to 1,520.55, 2,280.36 and 424.65

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Solution

The fourth proportional to 1,520.55, 2,280.36 and 424.65 is: 636.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,520.55 : 2,280.36 = 424.65 : x
  2. Step 2: Convert to fraction form
    1,520.55/2,280.36 = 424.65/x
  3. Step 3: Cross multiply
    1,520.55x = 2,280.36 × 424.65
  4. Step 4: Simplify right side
    1,520.55x = 968,354.87
  5. Step 5: Solve for x
    x = 968,354.87/1,520.55
  6. Step 6: Final answer
    x = 636.85

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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.