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Finding the Fourth Proportional to 1,471.11, 2,030.11 and 841.69

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Solution

The fourth proportional to 1,471.11, 2,030.11 and 841.69 is: 1,161.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,471.11 : 2,030.11 = 841.69 : x
  2. Step 2: Convert to fraction form
    1,471.11/2,030.11 = 841.69/x
  3. Step 3: Cross multiply
    1,471.11x = 2,030.11 × 841.69
  4. Step 4: Simplify right side
    1,471.11x = 1,708,723.29
  5. Step 5: Solve for x
    x = 1,708,723.29/1,471.11
  6. Step 6: Final answer
    x = 1,161.52

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Half scale
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Double scale
Find fourth proportional to 1,472.11, 2,031.49 and 842.69
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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.