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Finding the Fourth Proportional to 822.02, 1,134.85 and 570.31

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Solution

The fourth proportional to 822.02, 1,134.85 and 570.31 is: 787.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.02 : 1,134.85 = 570.31 : x
  2. Step 2: Convert to fraction form
    822.02/1,134.85 = 570.31/x
  3. Step 3: Cross multiply
    822.02x = 1,134.85 × 570.31
  4. Step 4: Simplify right side
    822.02x = 647,216.30
  5. Step 5: Solve for x
    x = 647,216.30/822.02
  6. Step 6: Final answer
    x = 787.35

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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.