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Finding the Fourth Proportional to 487.42, 731.58 and 256.46

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Solution

The fourth proportional to 487.42, 731.58 and 256.46 is: 384.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.42 : 731.58 = 256.46 : x
  2. Step 2: Convert to fraction form
    487.42/731.58 = 256.46/x
  3. Step 3: Cross multiply
    487.42x = 731.58 × 256.46
  4. Step 4: Simplify right side
    487.42x = 187,621.01
  5. Step 5: Solve for x
    x = 187,621.01/487.42
  6. Step 6: Final answer
    x = 384.93

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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.