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Finding the Fourth Proportional to 718.29, 990.22 and 562.77

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Solution

The fourth proportional to 718.29, 990.22 and 562.77 is: 775.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.29 : 990.22 = 562.77 : x
  2. Step 2: Convert to fraction form
    718.29/990.22 = 562.77/x
  3. Step 3: Cross multiply
    718.29x = 990.22 × 562.77
  4. Step 4: Simplify right side
    718.29x = 557,266.11
  5. Step 5: Solve for x
    x = 557,266.11/718.29
  6. Step 6: Final answer
    x = 775.82

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1.5x scale

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.