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Finding the Fourth Proportional to 3,425.68, 5,138.48 and 1,085.68

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Solution

The fourth proportional to 3,425.68, 5,138.48 and 1,085.68 is: 1,628.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,425.68 : 5,138.48 = 1,085.68 : x
  2. Step 2: Convert to fraction form
    3,425.68/5,138.48 = 1,085.68/x
  3. Step 3: Cross multiply
    3,425.68x = 5,138.48 × 1,085.68
  4. Step 4: Simplify right side
    3,425.68x = 5,578,726.69
  5. Step 5: Solve for x
    x = 5,578,726.69/3,425.68
  6. Step 6: Final answer
    x = 1,628.50

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Half scale
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Double scale
Find fourth proportional to 3,426.68, 5,139.97 and 1,086.68
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.