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Finding the Fourth Proportional to 312,472.20, 468,052.20 and 259,984.20

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Solution

The fourth proportional to 312,472.20, 468,052.20 and 259,984.20 is: 389,430.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,472.20 : 468,052.20 = 259,984.20 : x
  2. Step 2: Convert to fraction form
    312,472.20/468,052.20 = 259,984.20/x
  3. Step 3: Cross multiply
    312,472.20x = 468,052.20 × 259,984.20
  4. Step 4: Simplify right side
    312,472.20x = 121,686,176,775.24
  5. Step 5: Solve for x
    x = 121,686,176,775.24/312,472.20
  6. Step 6: Final answer
    x = 389,430.41

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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.