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Finding the Fourth Proportional to 261,088.48, 391,481.46 and 139,358.68

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Solution

The fourth proportional to 261,088.48, 391,481.46 and 139,358.68 is: 208,957.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,088.48 : 391,481.46 = 139,358.68 : x
  2. Step 2: Convert to fraction form
    261,088.48/391,481.46 = 139,358.68/x
  3. Step 3: Cross multiply
    261,088.48x = 391,481.46 × 139,358.68
  4. Step 4: Simplify right side
    261,088.48x = 54,556,339,510.07
  5. Step 5: Solve for x
    x = 54,556,339,510.07/261,088.48
  6. Step 6: Final answer
    x = 208,957.28

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1.5x scale

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.