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Finding the Fourth Proportional to 718.50, 992.00 and 560.86

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Solution

The fourth proportional to 718.50, 992.00 and 560.86 is: 774.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.50 : 992.00 = 560.86 : x
  2. Step 2: Convert to fraction form
    718.50/992.00 = 560.86/x
  3. Step 3: Cross multiply
    718.50x = 992.00 × 560.86
  4. Step 4: Simplify right side
    718.50x = 556,370.32
  5. Step 5: Solve for x
    x = 556,370.32/718.50
  6. Step 6: Final answer
    x = 774.35

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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.