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Finding the Fourth Proportional to 1,346.80, 1,842.20 and 1,314.40

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Solution

The fourth proportional to 1,346.80, 1,842.20 and 1,314.40 is: 1,797.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,346.80 : 1,842.20 = 1,314.40 : x
  2. Step 2: Convert to fraction form
    1,346.80/1,842.20 = 1,314.40/x
  3. Step 3: Cross multiply
    1,346.80x = 1,842.20 × 1,314.40
  4. Step 4: Simplify right side
    1,346.80x = 2,421,387.68
  5. Step 5: Solve for x
    x = 2,421,387.68/1,346.80
  6. Step 6: Final answer
    x = 1,797.88

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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.