Home / 638,187.96-880,699.39-351,708.05

Finding the Fourth Proportional to 638,187.96, 880,699.39 and 351,708.05

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Solution

The fourth proportional to 638,187.96, 880,699.39 and 351,708.05 is: 485,357.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,187.96 : 880,699.39 = 351,708.05 : x
  2. Step 2: Convert to fraction form
    638,187.96/880,699.39 = 351,708.05/x
  3. Step 3: Cross multiply
    638,187.96x = 880,699.39 × 351,708.05
  4. Step 4: Simplify right side
    638,187.96x = 309,749,063,938.60
  5. Step 5: Solve for x
    x = 309,749,063,938.60/638,187.96
  6. Step 6: Final answer
    x = 485,357.11

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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.