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Finding the Fourth Proportional to 261,043.60, 390,690.60 and 229,550.80

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Solution

The fourth proportional to 261,043.60, 390,690.60 and 229,550.80 is: 343,556.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,043.60 : 390,690.60 = 229,550.80 : x
  2. Step 2: Convert to fraction form
    261,043.60/390,690.60 = 229,550.80/x
  3. Step 3: Cross multiply
    261,043.60x = 390,690.60 × 229,550.80
  4. Step 4: Simplify right side
    261,043.60x = 89,683,339,782.48
  5. Step 5: Solve for x
    x = 89,683,339,782.48/261,043.60
  6. Step 6: Final answer
    x = 343,556.94

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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.