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Finding the Fourth Proportional to 576,820.80, 865,231.20 and 436,852.80

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Solution

The fourth proportional to 576,820.80, 865,231.20 and 436,852.80 is: 655,279.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    576,820.80 : 865,231.20 = 436,852.80 : x
  2. Step 2: Convert to fraction form
    576,820.80/865,231.20 = 436,852.80/x
  3. Step 3: Cross multiply
    576,820.80x = 865,231.20 × 436,852.80
  4. Step 4: Simplify right side
    576,820.80x = 377,978,672,367.36
  5. Step 5: Solve for x
    x = 377,978,672,367.36/576,820.80
  6. Step 6: Final answer
    x = 655,279.20

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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.