Home / 1,310.12-1,965.50-432.68

Finding the Fourth Proportional to 1,310.12, 1,965.50 and 432.68

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Solution

The fourth proportional to 1,310.12, 1,965.50 and 432.68 is: 649.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,310.12 : 1,965.50 = 432.68 : x
  2. Step 2: Convert to fraction form
    1,310.12/1,965.50 = 432.68/x
  3. Step 3: Cross multiply
    1,310.12x = 1,965.50 × 432.68
  4. Step 4: Simplify right side
    1,310.12x = 850,422.17
  5. Step 5: Solve for x
    x = 850,422.17/1,310.12
  6. Step 6: Final answer
    x = 649.12

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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.