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Finding the Fourth Proportional to 1,225.38, 1,690.52 and 701.12

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Solution

The fourth proportional to 1,225.38, 1,690.52 and 701.12 is: 967.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,225.38 : 1,690.52 = 701.12 : x
  2. Step 2: Convert to fraction form
    1,225.38/1,690.52 = 701.12/x
  3. Step 3: Cross multiply
    1,225.38x = 1,690.52 × 701.12
  4. Step 4: Simplify right side
    1,225.38x = 1,185,257.38
  5. Step 5: Solve for x
    x = 1,185,257.38/1,225.38
  6. Step 6: Final answer
    x = 967.26

Related Problems

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Half scale
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Double scale
Find fourth proportional to 1,226.38, 1,691.90 and 702.12
Similar ratio
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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.