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Finding the Fourth Proportional to 891.64, 1,337.40 and 525.28

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Solution

The fourth proportional to 891.64, 1,337.40 and 525.28 is: 787.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.64 : 1,337.40 = 525.28 : x
  2. Step 2: Convert to fraction form
    891.64/1,337.40 = 525.28/x
  3. Step 3: Cross multiply
    891.64x = 1,337.40 × 525.28
  4. Step 4: Simplify right side
    891.64x = 702,509.47
  5. Step 5: Solve for x
    x = 702,509.47/891.64
  6. Step 6: Final answer
    x = 787.88

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Double scale
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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.