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Finding the Fourth Proportional to 489,186.40, 674,791.24 and 307,610.86

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Solution

The fourth proportional to 489,186.40, 674,791.24 and 307,610.86 is: 424,323.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,186.40 : 674,791.24 = 307,610.86 : x
  2. Step 2: Convert to fraction form
    489,186.40/674,791.24 = 307,610.86/x
  3. Step 3: Cross multiply
    489,186.40x = 674,791.24 × 307,610.86
  4. Step 4: Simplify right side
    489,186.40x = 207,573,113,656.87
  5. Step 5: Solve for x
    x = 207,573,113,656.87/489,186.40
  6. Step 6: Final answer
    x = 424,323.15

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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.