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Finding the Fourth Proportional to 638,312.75, 880,861.07 and 351,859.49

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Solution

The fourth proportional to 638,312.75, 880,861.07 and 351,859.49 is: 485,560.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,312.75 : 880,861.07 = 351,859.49 : x
  2. Step 2: Convert to fraction form
    638,312.75/880,861.07 = 351,859.49/x
  3. Step 3: Cross multiply
    638,312.75x = 880,861.07 × 351,859.49
  4. Step 4: Simplify right side
    638,312.75x = 309,939,320,687.45
  5. Step 5: Solve for x
    x = 309,939,320,687.45/638,312.75
  6. Step 6: Final answer
    x = 485,560.29

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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.