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Finding the Fourth Proportional to 718.14, 990.36 and 552.36

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Solution

The fourth proportional to 718.14, 990.36 and 552.36 is: 761.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.14 : 990.36 = 552.36 : x
  2. Step 2: Convert to fraction form
    718.14/990.36 = 552.36/x
  3. Step 3: Cross multiply
    718.14x = 990.36 × 552.36
  4. Step 4: Simplify right side
    718.14x = 547,035.25
  5. Step 5: Solve for x
    x = 547,035.25/718.14
  6. Step 6: Final answer
    x = 761.74

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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.