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Finding the Fourth Proportional to 570.36, 787.16 and 321.71

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Solution

The fourth proportional to 570.36, 787.16 and 321.71 is: 443.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.36 : 787.16 = 321.71 : x
  2. Step 2: Convert to fraction form
    570.36/787.16 = 321.71/x
  3. Step 3: Cross multiply
    570.36x = 787.16 × 321.71
  4. Step 4: Simplify right side
    570.36x = 253,231.70
  5. Step 5: Solve for x
    x = 253,231.70/570.36
  6. Step 6: Final answer
    x = 443.99

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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.