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Finding the Fourth Proportional to 2,461.05, 3,691.80 and 999.90

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Solution

The fourth proportional to 2,461.05, 3,691.80 and 999.90 is: 1,499.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,461.05 : 3,691.80 = 999.90 : x
  2. Step 2: Convert to fraction form
    2,461.05/3,691.80 = 999.90/x
  3. Step 3: Cross multiply
    2,461.05x = 3,691.80 × 999.90
  4. Step 4: Simplify right side
    2,461.05x = 3,691,430.82
  5. Step 5: Solve for x
    x = 3,691,430.82/2,461.05
  6. Step 6: Final answer
    x = 1,499.94

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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.