Home / 685,417.52-945,791.16-398,988.56

Finding the Fourth Proportional to 685,417.52, 945,791.16 and 398,988.56

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Solution

The fourth proportional to 685,417.52, 945,791.16 and 398,988.56 is: 550,554.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,417.52 : 945,791.16 = 398,988.56 : x
  2. Step 2: Convert to fraction form
    685,417.52/945,791.16 = 398,988.56/x
  3. Step 3: Cross multiply
    685,417.52x = 945,791.16 × 398,988.56
  4. Step 4: Simplify right side
    685,417.52x = 377,359,852,989.13
  5. Step 5: Solve for x
    x = 377,359,852,989.13/685,417.52
  6. Step 6: Final answer
    x = 550,554.72

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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.