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Finding the Fourth Proportional to 1,166.61, 1,609.80 and 669.15

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Solution

The fourth proportional to 1,166.61, 1,609.80 and 669.15 is: 923.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,166.61 : 1,609.80 = 669.15 : x
  2. Step 2: Convert to fraction form
    1,166.61/1,609.80 = 669.15/x
  3. Step 3: Cross multiply
    1,166.61x = 1,609.80 × 669.15
  4. Step 4: Simplify right side
    1,166.61x = 1,077,197.67
  5. Step 5: Solve for x
    x = 1,077,197.67/1,166.61
  6. Step 6: Final answer
    x = 923.36

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1.5x scale

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.