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Finding the Fourth Proportional to 438,299.10, 656,976.42 and 213,810.84

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Solution

The fourth proportional to 438,299.10, 656,976.42 and 213,810.84 is: 320,485.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,299.10 : 656,976.42 = 213,810.84 : x
  2. Step 2: Convert to fraction form
    438,299.10/656,976.42 = 213,810.84/x
  3. Step 3: Cross multiply
    438,299.10x = 656,976.42 × 213,810.84
  4. Step 4: Simplify right side
    438,299.10x = 140,468,680,220.39
  5. Step 5: Solve for x
    x = 140,468,680,220.39/438,299.10
  6. Step 6: Final answer
    x = 320,485.90

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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.