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Finding the Fourth Proportional to 487.56, 673.40 and 440.92

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Solution

The fourth proportional to 487.56, 673.40 and 440.92 is: 608.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.56 : 673.40 = 440.92 : x
  2. Step 2: Convert to fraction form
    487.56/673.40 = 440.92/x
  3. Step 3: Cross multiply
    487.56x = 673.40 × 440.92
  4. Step 4: Simplify right side
    487.56x = 296,915.53
  5. Step 5: Solve for x
    x = 296,915.53/487.56
  6. Step 6: Final answer
    x = 608.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.