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Finding the Fourth Proportional to 638,140.50, 880,622.96 and 347,754.75

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Solution

The fourth proportional to 638,140.50, 880,622.96 and 347,754.75 is: 479,895.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,140.50 : 880,622.96 = 347,754.75 : x
  2. Step 2: Convert to fraction form
    638,140.50/880,622.96 = 347,754.75/x
  3. Step 3: Cross multiply
    638,140.50x = 880,622.96 × 347,754.75
  4. Step 4: Simplify right side
    638,140.50x = 306,240,815,560.29
  5. Step 5: Solve for x
    x = 306,240,815,560.29/638,140.50
  6. Step 6: Final answer
    x = 479,895.60

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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.