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Finding the Fourth Proportional to 864.14, 1,191.38 and 706.59

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Solution

The fourth proportional to 864.14, 1,191.38 and 706.59 is: 974.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    864.14 : 1,191.38 = 706.59 : x
  2. Step 2: Convert to fraction form
    864.14/1,191.38 = 706.59/x
  3. Step 3: Cross multiply
    864.14x = 1,191.38 × 706.59
  4. Step 4: Simplify right side
    864.14x = 841,813.66
  5. Step 5: Solve for x
    x = 841,813.66/864.14
  6. Step 6: Final answer
    x = 974.17

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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.