Home / 1,082.21-1,621.89-432.18

Finding the Fourth Proportional to 1,082.21, 1,621.89 and 432.18

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Solution

The fourth proportional to 1,082.21, 1,621.89 and 432.18 is: 647.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,082.21 : 1,621.89 = 432.18 : x
  2. Step 2: Convert to fraction form
    1,082.21/1,621.89 = 432.18/x
  3. Step 3: Cross multiply
    1,082.21x = 1,621.89 × 432.18
  4. Step 4: Simplify right side
    1,082.21x = 700,948.42
  5. Step 5: Solve for x
    x = 700,948.42/1,082.21
  6. Step 6: Final answer
    x = 647.70

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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.