Home / 438,313.20-658,247.40-338,715.60

Finding the Fourth Proportional to 438,313.20, 658,247.40 and 338,715.60

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Solution

The fourth proportional to 438,313.20, 658,247.40 and 338,715.60 is: 508,674.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,313.20 : 658,247.40 = 338,715.60 : x
  2. Step 2: Convert to fraction form
    438,313.20/658,247.40 = 338,715.60/x
  3. Step 3: Cross multiply
    438,313.20x = 658,247.40 × 338,715.60
  4. Step 4: Simplify right side
    438,313.20x = 222,958,663,039.44
  5. Step 5: Solve for x
    x = 222,958,663,039.44/438,313.20
  6. Step 6: Final answer
    x = 508,674.31

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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.