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Finding the Fourth Proportional to 1,520.48, 2,280.65 and 424.82

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Solution

The fourth proportional to 1,520.48, 2,280.65 and 424.82 is: 637.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,520.48 : 2,280.65 = 424.82 : x
  2. Step 2: Convert to fraction form
    1,520.48/2,280.65 = 424.82/x
  3. Step 3: Cross multiply
    1,520.48x = 2,280.65 × 424.82
  4. Step 4: Simplify right side
    1,520.48x = 968,869.31
  5. Step 5: Solve for x
    x = 968,869.31/1,520.48
  6. Step 6: Final answer
    x = 637.21

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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.