Home / 1,821.50-2,514.30-1,122.90

Finding the Fourth Proportional to 1,821.50, 2,514.30 and 1,122.90

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Solution

The fourth proportional to 1,821.50, 2,514.30 and 1,122.90 is: 1,549.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,821.50 : 2,514.30 = 1,122.90 : x
  2. Step 2: Convert to fraction form
    1,821.50/2,514.30 = 1,122.90/x
  3. Step 3: Cross multiply
    1,821.50x = 2,514.30 × 1,122.90
  4. Step 4: Simplify right side
    1,821.50x = 2,823,307.47
  5. Step 5: Solve for x
    x = 2,823,307.47/1,821.50
  6. Step 6: Final answer
    x = 1,549.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.