Home / 1,421.17-2,131.72-433.98

Finding the Fourth Proportional to 1,421.17, 2,131.72 and 433.98

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Solution

The fourth proportional to 1,421.17, 2,131.72 and 433.98 is: 650.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.17 : 2,131.72 = 433.98 : x
  2. Step 2: Convert to fraction form
    1,421.17/2,131.72 = 433.98/x
  3. Step 3: Cross multiply
    1,421.17x = 2,131.72 × 433.98
  4. Step 4: Simplify right side
    1,421.17x = 925,122.76
  5. Step 5: Solve for x
    x = 925,122.76/1,421.17
  6. Step 6: Final answer
    x = 650.96

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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.