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Finding the Fourth Proportional to 638,407.30, 880,992.54 and 351,921.22

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Solution

The fourth proportional to 638,407.30, 880,992.54 and 351,921.22 is: 485,646.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,407.30 : 880,992.54 = 351,921.22 : x
  2. Step 2: Convert to fraction form
    638,407.30/880,992.54 = 351,921.22/x
  3. Step 3: Cross multiply
    638,407.30x = 880,992.54 × 351,921.22
  4. Step 4: Simplify right side
    638,407.30x = 310,039,969,487.70
  5. Step 5: Solve for x
    x = 310,039,969,487.70/638,407.30
  6. Step 6: Final answer
    x = 485,646.03

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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.