Home / 387,943.20-581,319.36-261,113.76

Finding the Fourth Proportional to 387,943.20, 581,319.36 and 261,113.76

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Solution

The fourth proportional to 387,943.20, 581,319.36 and 261,113.76 is: 391,269.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,943.20 : 581,319.36 = 261,113.76 : x
  2. Step 2: Convert to fraction form
    387,943.20/581,319.36 = 261,113.76/x
  3. Step 3: Cross multiply
    387,943.20x = 581,319.36 × 261,113.76
  4. Step 4: Simplify right side
    387,943.20x = 151,790,483,850.39
  5. Step 5: Solve for x
    x = 151,790,483,850.39/387,943.20
  6. Step 6: Final answer
    x = 391,269.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.