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Finding the Fourth Proportional to 614.86, 921.62 and 302.72

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Solution

The fourth proportional to 614.86, 921.62 and 302.72 is: 453.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.86 : 921.62 = 302.72 : x
  2. Step 2: Convert to fraction form
    614.86/921.62 = 302.72/x
  3. Step 3: Cross multiply
    614.86x = 921.62 × 302.72
  4. Step 4: Simplify right side
    614.86x = 278,995.87
  5. Step 5: Solve for x
    x = 278,995.87/614.86
  6. Step 6: Final answer
    x = 453.76

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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.