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Finding the Fourth Proportional to 718.06, 988.56 and 560.48

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Solution

The fourth proportional to 718.06, 988.56 and 560.48 is: 771.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.06 : 988.56 = 560.48 : x
  2. Step 2: Convert to fraction form
    718.06/988.56 = 560.48/x
  3. Step 3: Cross multiply
    718.06x = 988.56 × 560.48
  4. Step 4: Simplify right side
    718.06x = 554,068.11
  5. Step 5: Solve for x
    x = 554,068.11/718.06
  6. Step 6: Final answer
    x = 771.62

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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.