Home / 638,381.85-880,966.62-351,906.72

Finding the Fourth Proportional to 638,381.85, 880,966.62 and 351,906.72

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Solution

The fourth proportional to 638,381.85, 880,966.62 and 351,906.72 is: 485,631.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,381.85 : 880,966.62 = 351,906.72 : x
  2. Step 2: Convert to fraction form
    638,381.85/880,966.62 = 351,906.72/x
  3. Step 3: Cross multiply
    638,381.85x = 880,966.62 × 351,906.72
  4. Step 4: Simplify right side
    638,381.85x = 310,018,073,673.69
  5. Step 5: Solve for x
    x = 310,018,073,673.69/638,381.85
  6. Step 6: Final answer
    x = 485,631.09

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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.