Home / 1,821.40-2,732.12-1,130.08

Finding the Fourth Proportional to 1,821.40, 2,732.12 and 1,130.08

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Solution

The fourth proportional to 1,821.40, 2,732.12 and 1,130.08 is: 1,695.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,821.40 : 2,732.12 = 1,130.08 : x
  2. Step 2: Convert to fraction form
    1,821.40/2,732.12 = 1,130.08/x
  3. Step 3: Cross multiply
    1,821.40x = 2,732.12 × 1,130.08
  4. Step 4: Simplify right side
    1,821.40x = 3,087,514.17
  5. Step 5: Solve for x
    x = 3,087,514.17/1,821.40
  6. Step 6: Final answer
    x = 1,695.13

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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.