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Finding the Fourth Proportional to 719.64, 990.88 and 562.92

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Solution

The fourth proportional to 719.64, 990.88 and 562.92 is: 775.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.64 : 990.88 = 562.92 : x
  2. Step 2: Convert to fraction form
    719.64/990.88 = 562.92/x
  3. Step 3: Cross multiply
    719.64x = 990.88 × 562.92
  4. Step 4: Simplify right side
    719.64x = 557,786.17
  5. Step 5: Solve for x
    x = 557,786.17/719.64
  6. Step 6: Final answer
    x = 775.09

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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.