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Finding the Fourth Proportional to 1,678.91, 2,517.75 and 753.55

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Solution

The fourth proportional to 1,678.91, 2,517.75 and 753.55 is: 1,130.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,678.91 : 2,517.75 = 753.55 : x
  2. Step 2: Convert to fraction form
    1,678.91/2,517.75 = 753.55/x
  3. Step 3: Cross multiply
    1,678.91x = 2,517.75 × 753.55
  4. Step 4: Simplify right side
    1,678.91x = 1,897,244.22
  5. Step 5: Solve for x
    x = 1,897,244.22/1,678.91
  6. Step 6: Final answer
    x = 1,130.05

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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.