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Finding the Fourth Proportional to 570.66, 787.55 and 321.99

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Solution

The fourth proportional to 570.66, 787.55 and 321.99 is: 444.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.66 : 787.55 = 321.99 : x
  2. Step 2: Convert to fraction form
    570.66/787.55 = 321.99/x
  3. Step 3: Cross multiply
    570.66x = 787.55 × 321.99
  4. Step 4: Simplify right side
    570.66x = 253,581.61
  5. Step 5: Solve for x
    x = 253,581.61/570.66
  6. Step 6: Final answer
    x = 444.37

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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.