Home / 1,821.60-2,732.40-999.45

Finding the Fourth Proportional to 1,821.60, 2,732.40 and 999.45

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Solution

The fourth proportional to 1,821.60, 2,732.40 and 999.45 is: 1,499.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,821.60 : 2,732.40 = 999.45 : x
  2. Step 2: Convert to fraction form
    1,821.60/2,732.40 = 999.45/x
  3. Step 3: Cross multiply
    1,821.60x = 2,732.40 × 999.45
  4. Step 4: Simplify right side
    1,821.60x = 2,730,897.18
  5. Step 5: Solve for x
    x = 2,730,897.18/1,821.60
  6. Step 6: Final answer
    x = 1,499.18

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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.