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Finding the Fourth Proportional to 671.60, 928 and 496.64

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Solution

The fourth proportional to 671.60, 928 and 496.64 is: 686.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.60 : 928 = 496.64 : x
  2. Step 2: Convert to fraction form
    671.60/928 = 496.64/x
  3. Step 3: Cross multiply
    671.60x = 928 × 496.64
  4. Step 4: Simplify right side
    671.60x = 460,881.92
  5. Step 5: Solve for x
    x = 460,881.92/671.60
  6. Step 6: Final answer
    x = 686.24

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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.