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Finding the Fourth Proportional to 1,488.43, 2,232.82 and 392.80

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Solution

The fourth proportional to 1,488.43, 2,232.82 and 392.80 is: 589.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,488.43 : 2,232.82 = 392.80 : x
  2. Step 2: Convert to fraction form
    1,488.43/2,232.82 = 392.80/x
  3. Step 3: Cross multiply
    1,488.43x = 2,232.82 × 392.80
  4. Step 4: Simplify right side
    1,488.43x = 877,048.58
  5. Step 5: Solve for x
    x = 877,048.58/1,488.43
  6. Step 6: Final answer
    x = 589.25

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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.