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Finding the Fourth Proportional to 1,042.87, 1,563.27 and 580.86

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Solution

The fourth proportional to 1,042.87, 1,563.27 and 580.86 is: 870.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,042.87 : 1,563.27 = 580.86 : x
  2. Step 2: Convert to fraction form
    1,042.87/1,563.27 = 580.86/x
  3. Step 3: Cross multiply
    1,042.87x = 1,563.27 × 580.86
  4. Step 4: Simplify right side
    1,042.87x = 908,041.01
  5. Step 5: Solve for x
    x = 908,041.01/1,042.87
  6. Step 6: Final answer
    x = 870.71

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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.