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Finding the Fourth Proportional to 269,518.20, 403,499.70 and 261,742.20

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Solution

The fourth proportional to 269,518.20, 403,499.70 and 261,742.20 is: 391,858.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,518.20 : 403,499.70 = 261,742.20 : x
  2. Step 2: Convert to fraction form
    269,518.20/403,499.70 = 261,742.20/x
  3. Step 3: Cross multiply
    269,518.20x = 403,499.70 × 261,742.20
  4. Step 4: Simplify right side
    269,518.20x = 105,612,899,177.34
  5. Step 5: Solve for x
    x = 105,612,899,177.34/269,518.20
  6. Step 6: Final answer
    x = 391,858.13

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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.