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Finding the Fourth Proportional to 876,209.40, 1,314,659.70 and 343,639.80

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Solution

The fourth proportional to 876,209.40, 1,314,659.70 and 343,639.80 is: 515,595.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,209.40 : 1,314,659.70 = 343,639.80 : x
  2. Step 2: Convert to fraction form
    876,209.40/1,314,659.70 = 343,639.80/x
  3. Step 3: Cross multiply
    876,209.40x = 1,314,659.70 × 343,639.80
  4. Step 4: Simplify right side
    876,209.40x = 451,769,396,376.06
  5. Step 5: Solve for x
    x = 451,769,396,376.06/876,209.40
  6. Step 6: Final answer
    x = 515,595.24

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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.