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Finding the Fourth Proportional to 718.11, 992.09 and 614.28

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Solution

The fourth proportional to 718.11, 992.09 and 614.28 is: 848.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.11 : 992.09 = 614.28 : x
  2. Step 2: Convert to fraction form
    718.11/992.09 = 614.28/x
  3. Step 3: Cross multiply
    718.11x = 992.09 × 614.28
  4. Step 4: Simplify right side
    718.11x = 609,421.05
  5. Step 5: Solve for x
    x = 609,421.05/718.11
  6. Step 6: Final answer
    x = 848.65

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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.