Home / 1,311.40-1,966.68-433.74

Finding the Fourth Proportional to 1,311.40, 1,966.68 and 433.74

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Solution

The fourth proportional to 1,311.40, 1,966.68 and 433.74 is: 650.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311.40 : 1,966.68 = 433.74 : x
  2. Step 2: Convert to fraction form
    1,311.40/1,966.68 = 433.74/x
  3. Step 3: Cross multiply
    1,311.40x = 1,966.68 × 433.74
  4. Step 4: Simplify right side
    1,311.40x = 853,027.78
  5. Step 5: Solve for x
    x = 853,027.78/1,311.40
  6. Step 6: Final answer
    x = 650.47

Related Problems

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Double scale
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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.