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Finding the Fourth Proportional to 876,998.40, 1,315,843.20 and 344,428.80

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Solution

The fourth proportional to 876,998.40, 1,315,843.20 and 344,428.80 is: 516,778.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,998.40 : 1,315,843.20 = 344,428.80 : x
  2. Step 2: Convert to fraction form
    876,998.40/1,315,843.20 = 344,428.80/x
  3. Step 3: Cross multiply
    876,998.40x = 1,315,843.20 × 344,428.80
  4. Step 4: Simplify right side
    876,998.40x = 453,214,294,364.16
  5. Step 5: Solve for x
    x = 453,214,294,364.16/876,998.40
  6. Step 6: Final answer
    x = 516,778.93

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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.