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Finding the Fourth Proportional to 1,589.30, 2,384.88 and 664.78

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Solution

The fourth proportional to 1,589.30, 2,384.88 and 664.78 is: 997.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,589.30 : 2,384.88 = 664.78 : x
  2. Step 2: Convert to fraction form
    1,589.30/2,384.88 = 664.78/x
  3. Step 3: Cross multiply
    1,589.30x = 2,384.88 × 664.78
  4. Step 4: Simplify right side
    1,589.30x = 1,585,420.53
  5. Step 5: Solve for x
    x = 1,585,420.53/1,589.30
  6. Step 6: Final answer
    x = 997.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.