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Finding the Fourth Proportional to 614.70, 920.40 and 370.74

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Solution

The fourth proportional to 614.70, 920.40 and 370.74 is: 555.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.70 : 920.40 = 370.74 : x
  2. Step 2: Convert to fraction form
    614.70/920.40 = 370.74/x
  3. Step 3: Cross multiply
    614.70x = 920.40 × 370.74
  4. Step 4: Simplify right side
    614.70x = 341,229.10
  5. Step 5: Solve for x
    x = 341,229.10/614.70
  6. Step 6: Final answer
    x = 555.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.