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Finding the Fourth Proportional to 1,131.17, 1,703.54 and 995.70

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Solution

The fourth proportional to 1,131.17, 1,703.54 and 995.70 is: 1,499.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131.17 : 1,703.54 = 995.70 : x
  2. Step 2: Convert to fraction form
    1,131.17/1,703.54 = 995.70/x
  3. Step 3: Cross multiply
    1,131.17x = 1,703.54 × 995.70
  4. Step 4: Simplify right side
    1,131.17x = 1,696,214.78
  5. Step 5: Solve for x
    x = 1,696,214.78/1,131.17
  6. Step 6: Final answer
    x = 1,499.52

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.