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Finding the Fourth Proportional to 864.89, 1,192.82 and 730.96

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Solution

The fourth proportional to 864.89, 1,192.82 and 730.96 is: 1,008.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.89 : 1,192.82 = 730.96 : x
  2. Step 2: Convert to fraction form
    864.89/1,192.82 = 730.96/x
  3. Step 3: Cross multiply
    864.89x = 1,192.82 × 730.96
  4. Step 4: Simplify right side
    864.89x = 871,903.71
  5. Step 5: Solve for x
    x = 871,903.71/864.89
  6. Step 6: Final answer
    x = 1,008.11

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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.