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Finding the Fourth Proportional to 638,372.46, 880,955.20 and 347,986.40

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Solution

The fourth proportional to 638,372.46, 880,955.20 and 347,986.40 is: 480,221.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,372.46 : 880,955.20 = 347,986.40 : x
  2. Step 2: Convert to fraction form
    638,372.46/880,955.20 = 347,986.40/x
  3. Step 3: Cross multiply
    638,372.46x = 880,955.20 × 347,986.40
  4. Step 4: Simplify right side
    638,372.46x = 306,560,423,334.54
  5. Step 5: Solve for x
    x = 306,560,423,334.54/638,372.46
  6. Step 6: Final answer
    x = 480,221.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.