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Finding the Fourth Proportional to 438,071.20, 656,847.60 and 228,119.20

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Solution

The fourth proportional to 438,071.20, 656,847.60 and 228,119.20 is: 342,043.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,071.20 : 656,847.60 = 228,119.20 : x
  2. Step 2: Convert to fraction form
    438,071.20/656,847.60 = 228,119.20/x
  3. Step 3: Cross multiply
    438,071.20x = 656,847.60 × 228,119.20
  4. Step 4: Simplify right side
    438,071.20x = 149,839,549,033.92
  5. Step 5: Solve for x
    x = 149,839,549,033.92/438,071.20
  6. Step 6: Final answer
    x = 342,043.83

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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.