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Finding the Fourth Proportional to 248,840, 343,290.91 and 158,147.40

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Solution

The fourth proportional to 248,840, 343,290.91 and 158,147.40 is: 218,174.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    248,840 : 343,290.91 = 158,147.40 : x
  2. Step 2: Convert to fraction form
    248,840/343,290.91 = 158,147.40/x
  3. Step 3: Cross multiply
    248,840x = 343,290.91 × 158,147.40
  4. Step 4: Simplify right side
    248,840x = 54,290,564,860.13
  5. Step 5: Solve for x
    x = 54,290,564,860.13/248,840
  6. Step 6: Final answer
    x = 218,174.59

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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.