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Finding the Fourth Proportional to 642,062.23, 886,074.60 and 351,694.24

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Solution

The fourth proportional to 642,062.23, 886,074.60 and 351,694.24 is: 485,353.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,062.23 : 886,074.60 = 351,694.24 : x
  2. Step 2: Convert to fraction form
    642,062.23/886,074.60 = 351,694.24/x
  3. Step 3: Cross multiply
    642,062.23x = 886,074.60 × 351,694.24
  4. Step 4: Simplify right side
    642,062.23x = 311,627,333,030.30
  5. Step 5: Solve for x
    x = 311,627,333,030.30/642,062.23
  6. Step 6: Final answer
    x = 485,353.78

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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.