Home / 261,534.40-391,776.48-221,381.44

Finding the Fourth Proportional to 261,534.40, 391,776.48 and 221,381.44

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Solution

The fourth proportional to 261,534.40, 391,776.48 and 221,381.44 is: 331,627.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,534.40 : 391,776.48 = 221,381.44 : x
  2. Step 2: Convert to fraction form
    261,534.40/391,776.48 = 221,381.44/x
  3. Step 3: Cross multiply
    261,534.40x = 391,776.48 × 221,381.44
  4. Step 4: Simplify right side
    261,534.40x = 86,732,041,300.53
  5. Step 5: Solve for x
    x = 86,732,041,300.53/261,534.40
  6. Step 6: Final answer
    x = 331,627.66

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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.