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Finding the Fourth Proportional to 1,257.19, 1,734.92 and 733.12

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Solution

The fourth proportional to 1,257.19, 1,734.92 and 733.12 is: 1,011.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,257.19 : 1,734.92 = 733.12 : x
  2. Step 2: Convert to fraction form
    1,257.19/1,734.92 = 733.12/x
  3. Step 3: Cross multiply
    1,257.19x = 1,734.92 × 733.12
  4. Step 4: Simplify right side
    1,257.19x = 1,271,899.30
  5. Step 5: Solve for x
    x = 1,271,899.30/1,257.19
  6. Step 6: Final answer
    x = 1,011.70

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Half scale
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Double scale
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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.