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Finding the Fourth Proportional to 321,146.16, 479,765.92 and 207,903.84

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Solution

The fourth proportional to 321,146.16, 479,765.92 and 207,903.84 is: 310,591.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,146.16 : 479,765.92 = 207,903.84 : x
  2. Step 2: Convert to fraction form
    321,146.16/479,765.92 = 207,903.84/x
  3. Step 3: Cross multiply
    321,146.16x = 479,765.92 × 207,903.84
  4. Step 4: Simplify right side
    321,146.16x = 99,745,177,069.13
  5. Step 5: Solve for x
    x = 99,745,177,069.13/321,146.16
  6. Step 6: Final answer
    x = 310,591.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.