Home / 1,257.35-1,731.27-1,117.23

Finding the Fourth Proportional to 1,257.35, 1,731.27 and 1,117.23

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Solution

The fourth proportional to 1,257.35, 1,731.27 and 1,117.23 is: 1,538.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,257.35 : 1,731.27 = 1,117.23 : x
  2. Step 2: Convert to fraction form
    1,257.35/1,731.27 = 1,117.23/x
  3. Step 3: Cross multiply
    1,257.35x = 1,731.27 × 1,117.23
  4. Step 4: Simplify right side
    1,257.35x = 1,934,226.78
  5. Step 5: Solve for x
    x = 1,934,226.78/1,257.35
  6. Step 6: Final answer
    x = 1,538.34

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Half scale
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Double scale
Find fourth proportional to 1,258.35, 1,732.65 and 1,118.23
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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.