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Finding the Fourth Proportional to 1,820.60, 2,729.28 and 999.32

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Solution

The fourth proportional to 1,820.60, 2,729.28 and 999.32 is: 1,498.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,820.60 : 2,729.28 = 999.32 : x
  2. Step 2: Convert to fraction form
    1,820.60/2,729.28 = 999.32/x
  3. Step 3: Cross multiply
    1,820.60x = 2,729.28 × 999.32
  4. Step 4: Simplify right side
    1,820.60x = 2,727,424.09
  5. Step 5: Solve for x
    x = 2,727,424.09/1,820.60
  6. Step 6: Final answer
    x = 1,498.09

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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.