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Finding the Fourth Proportional to 1,182.09, 1,631.08 and 684.71

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Solution

The fourth proportional to 1,182.09, 1,631.08 and 684.71 is: 944.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,182.09 : 1,631.08 = 684.71 : x
  2. Step 2: Convert to fraction form
    1,182.09/1,631.08 = 684.71/x
  3. Step 3: Cross multiply
    1,182.09x = 1,631.08 × 684.71
  4. Step 4: Simplify right side
    1,182.09x = 1,116,816.79
  5. Step 5: Solve for x
    x = 1,116,816.79/1,182.09
  6. Step 6: Final answer
    x = 944.78

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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.