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Finding the Fourth Proportional to 822.16, 1,133.40 and 527.20

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Solution

The fourth proportional to 822.16, 1,133.40 and 527.20 is: 726.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.16 : 1,133.40 = 527.20 : x
  2. Step 2: Convert to fraction form
    822.16/1,133.40 = 527.20/x
  3. Step 3: Cross multiply
    822.16x = 1,133.40 × 527.20
  4. Step 4: Simplify right side
    822.16x = 597,528.48
  5. Step 5: Solve for x
    x = 597,528.48/822.16
  6. Step 6: Final answer
    x = 726.78

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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.