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Finding the Fourth Proportional to 921.29, 1,381.91 and 373.32

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Solution

The fourth proportional to 921.29, 1,381.91 and 373.32 is: 559.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    921.29 : 1,381.91 = 373.32 : x
  2. Step 2: Convert to fraction form
    921.29/1,381.91 = 373.32/x
  3. Step 3: Cross multiply
    921.29x = 1,381.91 × 373.32
  4. Step 4: Simplify right side
    921.29x = 515,892.77
  5. Step 5: Solve for x
    x = 515,892.77/921.29
  6. Step 6: Final answer
    x = 559.97

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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.