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Finding the Fourth Proportional to 663.29, 915.39 and 570.33

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Solution

The fourth proportional to 663.29, 915.39 and 570.33 is: 787.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.29 : 915.39 = 570.33 : x
  2. Step 2: Convert to fraction form
    663.29/915.39 = 570.33/x
  3. Step 3: Cross multiply
    663.29x = 915.39 × 570.33
  4. Step 4: Simplify right side
    663.29x = 522,074.38
  5. Step 5: Solve for x
    x = 522,074.38/663.29
  6. Step 6: Final answer
    x = 787.10

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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.