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Finding the Fourth Proportional to 451,986, 623,739 and 248,040.40

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Solution

The fourth proportional to 451,986, 623,739 and 248,040.40 is: 342,294.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,986 : 623,739 = 248,040.40 : x
  2. Step 2: Convert to fraction form
    451,986/623,739 = 248,040.40/x
  3. Step 3: Cross multiply
    451,986x = 623,739 × 248,040.40
  4. Step 4: Simplify right side
    451,986x = 154,712,471,055.60
  5. Step 5: Solve for x
    x = 154,712,471,055.60/451,986
  6. Step 6: Final answer
    x = 342,294.83

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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.