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Finding the Fourth Proportional to 614.38, 920.96 and 289.16

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Solution

The fourth proportional to 614.38, 920.96 and 289.16 is: 433.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.38 : 920.96 = 289.16 : x
  2. Step 2: Convert to fraction form
    614.38/920.96 = 289.16/x
  3. Step 3: Cross multiply
    614.38x = 920.96 × 289.16
  4. Step 4: Simplify right side
    614.38x = 266,303.35
  5. Step 5: Solve for x
    x = 266,303.35/614.38
  6. Step 6: Final answer
    x = 433.45

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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.