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Finding the Fourth Proportional to 1,179.52, 1,628.76 and 985.12

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Solution

The fourth proportional to 1,179.52, 1,628.76 and 985.12 is: 1,360.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,179.52 : 1,628.76 = 985.12 : x
  2. Step 2: Convert to fraction form
    1,179.52/1,628.76 = 985.12/x
  3. Step 3: Cross multiply
    1,179.52x = 1,628.76 × 985.12
  4. Step 4: Simplify right side
    1,179.52x = 1,604,524.05
  5. Step 5: Solve for x
    x = 1,604,524.05/1,179.52
  6. Step 6: Final answer
    x = 1,360.32

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Half scale
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Double 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.