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Finding the Fourth Proportional to 948.70, 1,423.20 and 363.68

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Solution

The fourth proportional to 948.70, 1,423.20 and 363.68 is: 545.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.70 : 1,423.20 = 363.68 : x
  2. Step 2: Convert to fraction form
    948.70/1,423.20 = 363.68/x
  3. Step 3: Cross multiply
    948.70x = 1,423.20 × 363.68
  4. Step 4: Simplify right side
    948.70x = 517,589.38
  5. Step 5: Solve for x
    x = 517,589.38/948.70
  6. Step 6: Final answer
    x = 545.58

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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.