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Finding the Fourth Proportional to 521,510.75, 782,595.21 and 221,990.87

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Solution

The fourth proportional to 521,510.75, 782,595.21 and 221,990.87 is: 333,126.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,510.75 : 782,595.21 = 221,990.87 : x
  2. Step 2: Convert to fraction form
    521,510.75/782,595.21 = 221,990.87/x
  3. Step 3: Cross multiply
    521,510.75x = 782,595.21 × 221,990.87
  4. Step 4: Simplify right side
    521,510.75x = 173,728,991,525.73
  5. Step 5: Solve for x
    x = 173,728,991,525.73/521,510.75
  6. Step 6: Final answer
    x = 333,126.39

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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.