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Finding the Fourth Proportional to 1,144.92, 1,713.36 and 820.92

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Solution

The fourth proportional to 1,144.92, 1,713.36 and 820.92 is: 1,228.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,144.92 : 1,713.36 = 820.92 : x
  2. Step 2: Convert to fraction form
    1,144.92/1,713.36 = 820.92/x
  3. Step 3: Cross multiply
    1,144.92x = 1,713.36 × 820.92
  4. Step 4: Simplify right side
    1,144.92x = 1,406,531.49
  5. Step 5: Solve for x
    x = 1,406,531.49/1,144.92
  6. Step 6: Final answer
    x = 1,228.50

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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.