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Finding the Fourth Proportional to 500.42, 690.96 and 314.18

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Solution

The fourth proportional to 500.42, 690.96 and 314.18 is: 433.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.42 : 690.96 = 314.18 : x
  2. Step 2: Convert to fraction form
    500.42/690.96 = 314.18/x
  3. Step 3: Cross multiply
    500.42x = 690.96 × 314.18
  4. Step 4: Simplify right side
    500.42x = 217,085.81
  5. Step 5: Solve for x
    x = 217,085.81/500.42
  6. Step 6: Final answer
    x = 433.81

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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.