Home / 1,461.20-2,191.79-435.20

Finding the Fourth Proportional to 1,461.20, 2,191.79 and 435.20

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Solution

The fourth proportional to 1,461.20, 2,191.79 and 435.20 is: 652.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,461.20 : 2,191.79 = 435.20 : x
  2. Step 2: Convert to fraction form
    1,461.20/2,191.79 = 435.20/x
  3. Step 3: Cross multiply
    1,461.20x = 2,191.79 × 435.20
  4. Step 4: Simplify right side
    1,461.20x = 953,853.87
  5. Step 5: Solve for x
    x = 953,853.87/1,461.20
  6. Step 6: Final answer
    x = 652.79

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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.