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Finding the Fourth Proportional to 1,153.45, 1,728.66 and 632.68

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Solution

The fourth proportional to 1,153.45, 1,728.66 and 632.68 is: 948.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,153.45 : 1,728.66 = 632.68 : x
  2. Step 2: Convert to fraction form
    1,153.45/1,728.66 = 632.68/x
  3. Step 3: Cross multiply
    1,153.45x = 1,728.66 × 632.68
  4. Step 4: Simplify right side
    1,153.45x = 1,093,688.61
  5. Step 5: Solve for x
    x = 1,093,688.61/1,153.45
  6. Step 6: Final answer
    x = 948.19

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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.