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Finding the Fourth Proportional to 1,182.19, 1,631.25 and 684.65

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Solution

The fourth proportional to 1,182.19, 1,631.25 and 684.65 is: 944.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,182.19 : 1,631.25 = 684.65 : x
  2. Step 2: Convert to fraction form
    1,182.19/1,631.25 = 684.65/x
  3. Step 3: Cross multiply
    1,182.19x = 1,631.25 × 684.65
  4. Step 4: Simplify right side
    1,182.19x = 1,116,835.31
  5. Step 5: Solve for x
    x = 1,116,835.31/1,182.19
  6. Step 6: Final answer
    x = 944.72

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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.