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Finding the Fourth Proportional to 1,170.16, 1,614.82 and 646.19

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Solution

The fourth proportional to 1,170.16, 1,614.82 and 646.19 is: 891.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,170.16 : 1,614.82 = 646.19 : x
  2. Step 2: Convert to fraction form
    1,170.16/1,614.82 = 646.19/x
  3. Step 3: Cross multiply
    1,170.16x = 1,614.82 × 646.19
  4. Step 4: Simplify right side
    1,170.16x = 1,043,480.54
  5. Step 5: Solve for x
    x = 1,043,480.54/1,170.16
  6. Step 6: Final answer
    x = 891.74

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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.