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Finding the Fourth Proportional to 1,193.59, 1,647.23 and 669.61

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Solution

The fourth proportional to 1,193.59, 1,647.23 and 669.61 is: 924.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,193.59 : 1,647.23 = 669.61 : x
  2. Step 2: Convert to fraction form
    1,193.59/1,647.23 = 669.61/x
  3. Step 3: Cross multiply
    1,193.59x = 1,647.23 × 669.61
  4. Step 4: Simplify right side
    1,193.59x = 1,102,994.21
  5. Step 5: Solve for x
    x = 1,102,994.21/1,193.59
  6. Step 6: Final answer
    x = 924.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.