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Finding the Fourth Proportional to 436,865.85, 655,298.78 and 259,281.45

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Solution

The fourth proportional to 436,865.85, 655,298.78 and 259,281.45 is: 388,922.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,865.85 : 655,298.78 = 259,281.45 : x
  2. Step 2: Convert to fraction form
    436,865.85/655,298.78 = 259,281.45/x
  3. Step 3: Cross multiply
    436,865.85x = 655,298.78 × 259,281.45
  4. Step 4: Simplify right side
    436,865.85x = 169,906,816,565.22
  5. Step 5: Solve for x
    x = 169,906,816,565.22/436,865.85
  6. Step 6: Final answer
    x = 388,922.18

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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.