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Finding the Fourth Proportional to 1,724.60, 2,585.36 and 628.74

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Solution

The fourth proportional to 1,724.60, 2,585.36 and 628.74 is: 942.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,724.60 : 2,585.36 = 628.74 : x
  2. Step 2: Convert to fraction form
    1,724.60/2,585.36 = 628.74/x
  3. Step 3: Cross multiply
    1,724.60x = 2,585.36 × 628.74
  4. Step 4: Simplify right side
    1,724.60x = 1,625,519.25
  5. Step 5: Solve for x
    x = 1,625,519.25/1,724.60
  6. Step 6: Final answer
    x = 942.55

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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.