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Finding the Fourth Proportional to 1,041.96, 1,561.80 and 579.96

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Solution

The fourth proportional to 1,041.96, 1,561.80 and 579.96 is: 869.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,041.96 : 1,561.80 = 579.96 : x
  2. Step 2: Convert to fraction form
    1,041.96/1,561.80 = 579.96/x
  3. Step 3: Cross multiply
    1,041.96x = 1,561.80 × 579.96
  4. Step 4: Simplify right side
    1,041.96x = 905,781.53
  5. Step 5: Solve for x
    x = 905,781.53/1,041.96
  6. Step 6: Final answer
    x = 869.31

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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.