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Finding the Fourth Proportional to 268,205.80, 402,308.70 and 240,212.20

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Solution

The fourth proportional to 268,205.80, 402,308.70 and 240,212.20 is: 360,318.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,205.80 : 402,308.70 = 240,212.20 : x
  2. Step 2: Convert to fraction form
    268,205.80/402,308.70 = 240,212.20/x
  3. Step 3: Cross multiply
    268,205.80x = 402,308.70 × 240,212.20
  4. Step 4: Simplify right side
    268,205.80x = 96,639,457,906.14
  5. Step 5: Solve for x
    x = 96,639,457,906.14/268,205.80
  6. Step 6: Final answer
    x = 360,318.30

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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.