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Finding the Fourth Proportional to 1,177.49, 1,624.74 and 680.19

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Solution

The fourth proportional to 1,177.49, 1,624.74 and 680.19 is: 938.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,177.49 : 1,624.74 = 680.19 : x
  2. Step 2: Convert to fraction form
    1,177.49/1,624.74 = 680.19/x
  3. Step 3: Cross multiply
    1,177.49x = 1,624.74 × 680.19
  4. Step 4: Simplify right side
    1,177.49x = 1,105,131.90
  5. Step 5: Solve for x
    x = 1,105,131.90/1,177.49
  6. Step 6: Final answer
    x = 938.55

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Half scale
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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.