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Finding the Fourth Proportional to 261,992.48, 361,430.91 and 154,512.36

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Solution

The fourth proportional to 261,992.48, 361,430.91 and 154,512.36 is: 213,157.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,992.48 : 361,430.91 = 154,512.36 : x
  2. Step 2: Convert to fraction form
    261,992.48/361,430.91 = 154,512.36/x
  3. Step 3: Cross multiply
    261,992.48x = 361,430.91 × 154,512.36
  4. Step 4: Simplify right side
    261,992.48x = 55,845,542,881.05
  5. Step 5: Solve for x
    x = 55,845,542,881.05/261,992.48
  6. Step 6: Final answer
    x = 213,157.05

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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.