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Finding the Fourth Proportional to 638,173.36, 880,685.34 and 351,703.96

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Solution

The fourth proportional to 638,173.36, 880,685.34 and 351,703.96 is: 485,354.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,173.36 : 880,685.34 = 351,703.96 : x
  2. Step 2: Convert to fraction form
    638,173.36/880,685.34 = 351,703.96/x
  3. Step 3: Cross multiply
    638,173.36x = 880,685.34 × 351,703.96
  4. Step 4: Simplify right side
    638,173.36x = 309,740,521,591.95
  5. Step 5: Solve for x
    x = 309,740,521,591.95/638,173.36
  6. Step 6: Final answer
    x = 485,354.83

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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.