Home / 1,520.12-2,280.14-424.45

Finding the Fourth Proportional to 1,520.12, 2,280.14 and 424.45

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Solution

The fourth proportional to 1,520.12, 2,280.14 and 424.45 is: 636.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,520.12 : 2,280.14 = 424.45 : x
  2. Step 2: Convert to fraction form
    1,520.12/2,280.14 = 424.45/x
  3. Step 3: Cross multiply
    1,520.12x = 2,280.14 × 424.45
  4. Step 4: Simplify right side
    1,520.12x = 967,805.42
  5. Step 5: Solve for x
    x = 967,805.42/1,520.12
  6. Step 6: Final answer
    x = 636.66

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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.