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Finding the Fourth Proportional to 570.68, 787.48 and 321.99

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Solution

The fourth proportional to 570.68, 787.48 and 321.99 is: 444.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.68 : 787.48 = 321.99 : x
  2. Step 2: Convert to fraction form
    570.68/787.48 = 321.99/x
  3. Step 3: Cross multiply
    570.68x = 787.48 × 321.99
  4. Step 4: Simplify right side
    570.68x = 253,560.69
  5. Step 5: Solve for x
    x = 253,560.69/570.68
  6. Step 6: Final answer
    x = 444.31

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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.