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Finding the Fourth Proportional to 265,556.79, 398,630.43 and 261,423.36

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Solution

The fourth proportional to 265,556.79, 398,630.43 and 261,423.36 is: 392,425.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,556.79 : 398,630.43 = 261,423.36 : x
  2. Step 2: Convert to fraction form
    265,556.79/398,630.43 = 261,423.36/x
  3. Step 3: Cross multiply
    265,556.79x = 398,630.43 × 261,423.36
  4. Step 4: Simplify right side
    265,556.79x = 104,211,306,408.85
  5. Step 5: Solve for x
    x = 104,211,306,408.85/265,556.79
  6. Step 6: Final answer
    x = 392,425.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.