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Finding the Fourth Proportional to 570.69, 787.47 and 321.98

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Solution

The fourth proportional to 570.69, 787.47 and 321.98 is: 444.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.69 : 787.47 = 321.98 : x
  2. Step 2: Convert to fraction form
    570.69/787.47 = 321.98/x
  3. Step 3: Cross multiply
    570.69x = 787.47 × 321.98
  4. Step 4: Simplify right side
    570.69x = 253,545.65
  5. Step 5: Solve for x
    x = 253,545.65/570.69
  6. Step 6: Final answer
    x = 444.28

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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.