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Finding the Fourth Proportional to 570.54, 787.33 and 321.85

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Solution

The fourth proportional to 570.54, 787.33 and 321.85 is: 444.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.54 : 787.33 = 321.85 : x
  2. Step 2: Convert to fraction form
    570.54/787.33 = 321.85/x
  3. Step 3: Cross multiply
    570.54x = 787.33 × 321.85
  4. Step 4: Simplify right side
    570.54x = 253,402.16
  5. Step 5: Solve for x
    x = 253,402.16/570.54
  6. Step 6: Final answer
    x = 444.14

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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.