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Finding the Fourth Proportional to 675.70, 932.85 and 488.99

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Solution

The fourth proportional to 675.70, 932.85 and 488.99 is: 675.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    675.70 : 932.85 = 488.99 : x
  2. Step 2: Convert to fraction form
    675.70/932.85 = 488.99/x
  3. Step 3: Cross multiply
    675.70x = 932.85 × 488.99
  4. Step 4: Simplify right side
    675.70x = 456,156.65
  5. Step 5: Solve for x
    x = 456,156.65/675.70
  6. Step 6: Final answer
    x = 675.09

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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.