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Finding the Fourth Proportional to 557,139.20, 835,708.80 and 521,709.80

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Solution

The fourth proportional to 557,139.20, 835,708.80 and 521,709.80 is: 782,564.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,139.20 : 835,708.80 = 521,709.80 : x
  2. Step 2: Convert to fraction form
    557,139.20/835,708.80 = 521,709.80/x
  3. Step 3: Cross multiply
    557,139.20x = 835,708.80 × 521,709.80
  4. Step 4: Simplify right side
    557,139.20x = 435,997,470,906.24
  5. Step 5: Solve for x
    x = 435,997,470,906.24/557,139.20
  6. Step 6: Final answer
    x = 782,564.70

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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.