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Finding the Fourth Proportional to 220,372.80, 330,866.40 and 137,428.80

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Solution

The fourth proportional to 220,372.80, 330,866.40 and 137,428.80 is: 206,334.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,372.80 : 330,866.40 = 137,428.80 : x
  2. Step 2: Convert to fraction form
    220,372.80/330,866.40 = 137,428.80/x
  3. Step 3: Cross multiply
    220,372.80x = 330,866.40 × 137,428.80
  4. Step 4: Simplify right side
    220,372.80x = 45,470,572,312.32
  5. Step 5: Solve for x
    x = 45,470,572,312.32/220,372.80
  6. Step 6: Final answer
    x = 206,334.78

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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.