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Finding the Fourth Proportional to 1,152.45, 1,728.89 and 632.17

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Solution

The fourth proportional to 1,152.45, 1,728.89 and 632.17 is: 948.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,152.45 : 1,728.89 = 632.17 : x
  2. Step 2: Convert to fraction form
    1,152.45/1,728.89 = 632.17/x
  3. Step 3: Cross multiply
    1,152.45x = 1,728.89 × 632.17
  4. Step 4: Simplify right side
    1,152.45x = 1,092,952.39
  5. Step 5: Solve for x
    x = 1,092,952.39/1,152.45
  6. Step 6: Final answer
    x = 948.37

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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.