Home / 261,320.31-391,455.54-221,166.99

Finding the Fourth Proportional to 261,320.31, 391,455.54 and 221,166.99

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Solution

The fourth proportional to 261,320.31, 391,455.54 and 221,166.99 is: 331,306.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,320.31 : 391,455.54 = 221,166.99 : x
  2. Step 2: Convert to fraction form
    261,320.31/391,455.54 = 221,166.99/x
  3. Step 3: Cross multiply
    261,320.31x = 391,455.54 × 221,166.99
  4. Step 4: Simplify right side
    261,320.31x = 86,577,043,500.62
  5. Step 5: Solve for x
    x = 86,577,043,500.62/261,320.31
  6. Step 6: Final answer
    x = 331,306.22

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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.