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Finding the Fourth Proportional to 1,193.80, 1,790.16 and 424.32

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Solution

The fourth proportional to 1,193.80, 1,790.16 and 424.32 is: 636.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,193.80 : 1,790.16 = 424.32 : x
  2. Step 2: Convert to fraction form
    1,193.80/1,790.16 = 424.32/x
  3. Step 3: Cross multiply
    1,193.80x = 1,790.16 × 424.32
  4. Step 4: Simplify right side
    1,193.80x = 759,600.69
  5. Step 5: Solve for x
    x = 759,600.69/1,193.80
  6. Step 6: Final answer
    x = 636.29

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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.