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Finding the Fourth Proportional to 649.42, 972.74 and 525.49

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Solution

The fourth proportional to 649.42, 972.74 and 525.49 is: 787.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.42 : 972.74 = 525.49 : x
  2. Step 2: Convert to fraction form
    649.42/972.74 = 525.49/x
  3. Step 3: Cross multiply
    649.42x = 972.74 × 525.49
  4. Step 4: Simplify right side
    649.42x = 511,164.02
  5. Step 5: Solve for x
    x = 511,164.02/649.42
  6. Step 6: Final answer
    x = 787.11

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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.