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Finding the Fourth Proportional to 1,118.30, 1,674.85 and 885.65

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Solution

The fourth proportional to 1,118.30, 1,674.85 and 885.65 is: 1,326.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,118.30 : 1,674.85 = 885.65 : x
  2. Step 2: Convert to fraction form
    1,118.30/1,674.85 = 885.65/x
  3. Step 3: Cross multiply
    1,118.30x = 1,674.85 × 885.65
  4. Step 4: Simplify right side
    1,118.30x = 1,483,330.90
  5. Step 5: Solve for x
    x = 1,483,330.90/1,118.30
  6. Step 6: Final answer
    x = 1,326.42

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1.5x scale

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.