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Finding the Fourth Proportional to 670.47, 925.34 and 404.92

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Solution

The fourth proportional to 670.47, 925.34 and 404.92 is: 558.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.47 : 925.34 = 404.92 : x
  2. Step 2: Convert to fraction form
    670.47/925.34 = 404.92/x
  3. Step 3: Cross multiply
    670.47x = 925.34 × 404.92
  4. Step 4: Simplify right side
    670.47x = 374,687.80
  5. Step 5: Solve for x
    x = 374,687.80/670.47
  6. Step 6: Final answer
    x = 558.85

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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.