Home / 638,341.86-880,917.73-351,872.20

Finding the Fourth Proportional to 638,341.86, 880,917.73 and 351,872.20

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Solution

The fourth proportional to 638,341.86, 880,917.73 and 351,872.20 is: 485,586.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,341.86 : 880,917.73 = 351,872.20 : x
  2. Step 2: Convert to fraction form
    638,341.86/880,917.73 = 351,872.20/x
  3. Step 3: Cross multiply
    638,341.86x = 880,917.73 × 351,872.20
  4. Step 4: Simplify right side
    638,341.86x = 309,970,459,895.57
  5. Step 5: Solve for x
    x = 309,970,459,895.57/638,341.86
  6. Step 6: Final answer
    x = 485,586.92

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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.