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Finding the Fourth Proportional to 1,039.57, 1,558.87 and 577.19

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Solution

The fourth proportional to 1,039.57, 1,558.87 and 577.19 is: 865.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,039.57 : 1,558.87 = 577.19 : x
  2. Step 2: Convert to fraction form
    1,039.57/1,558.87 = 577.19/x
  3. Step 3: Cross multiply
    1,039.57x = 1,558.87 × 577.19
  4. Step 4: Simplify right side
    1,039.57x = 899,764.18
  5. Step 5: Solve for x
    x = 899,764.18/1,039.57
  6. Step 6: Final answer
    x = 865.52

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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.