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Finding the Fourth Proportional to 1,002.30, 1,503.26 and 425.58

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Solution

The fourth proportional to 1,002.30, 1,503.26 and 425.58 is: 638.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,002.30 : 1,503.26 = 425.58 : x
  2. Step 2: Convert to fraction form
    1,002.30/1,503.26 = 425.58/x
  3. Step 3: Cross multiply
    1,002.30x = 1,503.26 × 425.58
  4. Step 4: Simplify right side
    1,002.30x = 639,757.39
  5. Step 5: Solve for x
    x = 639,757.39/1,002.30
  6. Step 6: Final answer
    x = 638.29

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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.