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Finding the Fourth Proportional to 687.08, 1,030.62 and 167.08

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Solution

The fourth proportional to 687.08, 1,030.62 and 167.08 is: 250.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    687.08 : 1,030.62 = 167.08 : x
  2. Step 2: Convert to fraction form
    687.08/1,030.62 = 167.08/x
  3. Step 3: Cross multiply
    687.08x = 1,030.62 × 167.08
  4. Step 4: Simplify right side
    687.08x = 172,195.99
  5. Step 5: Solve for x
    x = 172,195.99/687.08
  6. Step 6: Final answer
    x = 250.62

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Similar ratio
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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.