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Finding the Fourth Proportional to 1,271.38, 1,755.08 and 747.45

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Solution

The fourth proportional to 1,271.38, 1,755.08 and 747.45 is: 1,031.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,271.38 : 1,755.08 = 747.45 : x
  2. Step 2: Convert to fraction form
    1,271.38/1,755.08 = 747.45/x
  3. Step 3: Cross multiply
    1,271.38x = 1,755.08 × 747.45
  4. Step 4: Simplify right side
    1,271.38x = 1,311,834.55
  5. Step 5: Solve for x
    x = 1,311,834.55/1,271.38
  6. Step 6: Final answer
    x = 1,031.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.