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Finding the Fourth Proportional to 445,805.20, 668,707.80 and 268,220.80

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Solution

The fourth proportional to 445,805.20, 668,707.80 and 268,220.80 is: 402,331.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,805.20 : 668,707.80 = 268,220.80 : x
  2. Step 2: Convert to fraction form
    445,805.20/668,707.80 = 268,220.80/x
  3. Step 3: Cross multiply
    445,805.20x = 668,707.80 × 268,220.80
  4. Step 4: Simplify right side
    445,805.20x = 179,361,341,082.24
  5. Step 5: Solve for x
    x = 179,361,341,082.24/445,805.20
  6. Step 6: Final answer
    x = 402,331.20

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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.