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Finding the Fourth Proportional to 638,215.83, 880,720.56 and 351,735.84

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Solution

The fourth proportional to 638,215.83, 880,720.56 and 351,735.84 is: 485,385.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,215.83 : 880,720.56 = 351,735.84 : x
  2. Step 2: Convert to fraction form
    638,215.83/880,720.56 = 351,735.84/x
  3. Step 3: Cross multiply
    638,215.83x = 880,720.56 × 351,735.84
  4. Step 4: Simplify right side
    638,215.83x = 309,780,985,976.87
  5. Step 5: Solve for x
    x = 309,780,985,976.87/638,215.83
  6. Step 6: Final answer
    x = 485,385.93

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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.