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Finding the Fourth Proportional to 261,527.40, 391,765.98 and 221,374.44

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Solution

The fourth proportional to 261,527.40, 391,765.98 and 221,374.44 is: 331,617.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,527.40 : 391,765.98 = 221,374.44 : x
  2. Step 2: Convert to fraction form
    261,527.40/391,765.98 = 221,374.44/x
  3. Step 3: Cross multiply
    261,527.40x = 391,765.98 × 221,374.44
  4. Step 4: Simplify right side
    261,527.40x = 86,726,974,433.55
  5. Step 5: Solve for x
    x = 86,726,974,433.55/261,527.40
  6. Step 6: Final answer
    x = 331,617.16

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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.