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Finding the Fourth Proportional to 1,343.76, 1,840.99 and 1,291.92

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Solution

The fourth proportional to 1,343.76, 1,840.99 and 1,291.92 is: 1,769.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,343.76 : 1,840.99 = 1,291.92 : x
  2. Step 2: Convert to fraction form
    1,343.76/1,840.99 = 1,291.92/x
  3. Step 3: Cross multiply
    1,343.76x = 1,840.99 × 1,291.92
  4. Step 4: Simplify right side
    1,343.76x = 2,378,411.80
  5. Step 5: Solve for x
    x = 2,378,411.80/1,343.76
  6. Step 6: Final answer
    x = 1,769.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.