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Finding the Fourth Proportional to 344,112.40, 515,995.80 and 156,912.40

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Solution

The fourth proportional to 344,112.40, 515,995.80 and 156,912.40 is: 235,289.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    344,112.40 : 515,995.80 = 156,912.40 : x
  2. Step 2: Convert to fraction form
    344,112.40/515,995.80 = 156,912.40/x
  3. Step 3: Cross multiply
    344,112.40x = 515,995.80 × 156,912.40
  4. Step 4: Simplify right side
    344,112.40x = 80,966,139,367.92
  5. Step 5: Solve for x
    x = 80,966,139,367.92/344,112.40
  6. Step 6: Final answer
    x = 235,289.80

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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.