Home / 642,313.48-886,398.78-355,839.64

Finding the Fourth Proportional to 642,313.48, 886,398.78 and 355,839.64

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Solution

The fourth proportional to 642,313.48, 886,398.78 and 355,839.64 is: 491,062.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,313.48 : 886,398.78 = 355,839.64 : x
  2. Step 2: Convert to fraction form
    642,313.48/886,398.78 = 355,839.64/x
  3. Step 3: Cross multiply
    642,313.48x = 886,398.78 × 355,839.64
  4. Step 4: Simplify right side
    642,313.48x = 315,415,822,771.64
  5. Step 5: Solve for x
    x = 315,415,822,771.64/642,313.48
  6. Step 6: Final answer
    x = 491,062.13

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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.