Home / 1,310.61-1,965.45-432.90

Finding the Fourth Proportional to 1,310.61, 1,965.45 and 432.90

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Solution

The fourth proportional to 1,310.61, 1,965.45 and 432.90 is: 649.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,310.61 : 1,965.45 = 432.90 : x
  2. Step 2: Convert to fraction form
    1,310.61/1,965.45 = 432.90/x
  3. Step 3: Cross multiply
    1,310.61x = 1,965.45 × 432.90
  4. Step 4: Simplify right side
    1,310.61x = 850,843.31
  5. Step 5: Solve for x
    x = 850,843.31/1,310.61
  6. Step 6: Final answer
    x = 649.20

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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.