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Finding the Fourth Proportional to 921.15, 1,381.01 and 592.29

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Solution

The fourth proportional to 921.15, 1,381.01 and 592.29 is: 887.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    921.15 : 1,381.01 = 592.29 : x
  2. Step 2: Convert to fraction form
    921.15/1,381.01 = 592.29/x
  3. Step 3: Cross multiply
    921.15x = 1,381.01 × 592.29
  4. Step 4: Simplify right side
    921.15x = 817,955.45
  5. Step 5: Solve for x
    x = 817,955.45/921.15
  6. Step 6: Final answer
    x = 887.97

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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.