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Finding the Fourth Proportional to 1,680.60, 2,520 and 584.64

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Solution

The fourth proportional to 1,680.60, 2,520 and 584.64 is: 876.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.60 : 2,520 = 584.64 : x
  2. Step 2: Convert to fraction form
    1,680.60/2,520 = 584.64/x
  3. Step 3: Cross multiply
    1,680.60x = 2,520 × 584.64
  4. Step 4: Simplify right side
    1,680.60x = 1,473,292.80
  5. Step 5: Solve for x
    x = 1,473,292.80/1,680.60
  6. Step 6: Final answer
    x = 876.65

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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.