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Finding the Fourth Proportional to 557,091.20, 835,636.80 and 521,661.80

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Solution

The fourth proportional to 557,091.20, 835,636.80 and 521,661.80 is: 782,492.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,091.20 : 835,636.80 = 521,661.80 : x
  2. Step 2: Convert to fraction form
    557,091.20/835,636.80 = 521,661.80/x
  3. Step 3: Cross multiply
    557,091.20x = 835,636.80 × 521,661.80
  4. Step 4: Simplify right side
    557,091.20x = 435,919,797,234.24
  5. Step 5: Solve for x
    x = 435,919,797,234.24/557,091.20
  6. Step 6: Final answer
    x = 782,492.70

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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.