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Finding the Fourth Proportional to 672.57, 928.35 and 473.49

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Solution

The fourth proportional to 672.57, 928.35 and 473.49 is: 653.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.57 : 928.35 = 473.49 : x
  2. Step 2: Convert to fraction form
    672.57/928.35 = 473.49/x
  3. Step 3: Cross multiply
    672.57x = 928.35 × 473.49
  4. Step 4: Simplify right side
    672.57x = 439,564.44
  5. Step 5: Solve for x
    x = 439,564.44/672.57
  6. Step 6: Final answer
    x = 653.56

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1.5x scale

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.