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Finding the Fourth Proportional to 1,002.56, 1,501.90 and 611.44

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Solution

The fourth proportional to 1,002.56, 1,501.90 and 611.44 is: 915.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,002.56 : 1,501.90 = 611.44 : x
  2. Step 2: Convert to fraction form
    1,002.56/1,501.90 = 611.44/x
  3. Step 3: Cross multiply
    1,002.56x = 1,501.90 × 611.44
  4. Step 4: Simplify right side
    1,002.56x = 918,321.74
  5. Step 5: Solve for x
    x = 918,321.74/1,002.56
  6. Step 6: Final answer
    x = 915.98

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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.