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Finding the Fourth Proportional to 1,272.90, 1,908.83 and 532.03

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Solution

The fourth proportional to 1,272.90, 1,908.83 and 532.03 is: 797.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272.90 : 1,908.83 = 532.03 : x
  2. Step 2: Convert to fraction form
    1,272.90/1,908.83 = 532.03/x
  3. Step 3: Cross multiply
    1,272.90x = 1,908.83 × 532.03
  4. Step 4: Simplify right side
    1,272.90x = 1,015,545.28
  5. Step 5: Solve for x
    x = 1,015,545.28/1,272.90
  6. Step 6: Final answer
    x = 797.82

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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.