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Finding the Fourth Proportional to 614.40, 847.29 and 404.74

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Solution

The fourth proportional to 614.40, 847.29 and 404.74 is: 558.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.40 : 847.29 = 404.74 : x
  2. Step 2: Convert to fraction form
    614.40/847.29 = 404.74/x
  3. Step 3: Cross multiply
    614.40x = 847.29 × 404.74
  4. Step 4: Simplify right side
    614.40x = 342,932.15
  5. Step 5: Solve for x
    x = 342,932.15/614.40
  6. Step 6: Final answer
    x = 558.16

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