Home / 1,229.40-1,844.10-646.20

Finding the Fourth Proportional to 1,229.40, 1,844.10 and 646.20

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Solution

The fourth proportional to 1,229.40, 1,844.10 and 646.20 is: 969.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,229.40 : 1,844.10 = 646.20 : x
  2. Step 2: Convert to fraction form
    1,229.40/1,844.10 = 646.20/x
  3. Step 3: Cross multiply
    1,229.40x = 1,844.10 × 646.20
  4. Step 4: Simplify right side
    1,229.40x = 1,191,657.42
  5. Step 5: Solve for x
    x = 1,191,657.42/1,229.40
  6. Step 6: Final answer
    x = 969.30

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Half scale
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Double scale
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Similar ratio
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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.