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Finding the Fourth Proportional to 1,048.73, 1,571.75 and 432.87

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Solution

The fourth proportional to 1,048.73, 1,571.75 and 432.87 is: 648.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,048.73 : 1,571.75 = 432.87 : x
  2. Step 2: Convert to fraction form
    1,048.73/1,571.75 = 432.87/x
  3. Step 3: Cross multiply
    1,048.73x = 1,571.75 × 432.87
  4. Step 4: Simplify right side
    1,048.73x = 680,362.00
  5. Step 5: Solve for x
    x = 680,362.00/1,048.73
  6. Step 6: Final answer
    x = 648.75

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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.