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Finding the Fourth Proportional to 205,319.40, 308,151.90 and 100,228.20

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Solution

The fourth proportional to 205,319.40, 308,151.90 and 100,228.20 is: 150,426.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,319.40 : 308,151.90 = 100,228.20 : x
  2. Step 2: Convert to fraction form
    205,319.40/308,151.90 = 100,228.20/x
  3. Step 3: Cross multiply
    205,319.40x = 308,151.90 × 100,228.20
  4. Step 4: Simplify right side
    205,319.40x = 30,885,510,263.58
  5. Step 5: Solve for x
    x = 30,885,510,263.58/205,319.40
  6. Step 6: Final answer
    x = 150,426.65

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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.