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Finding the Fourth Proportional to 269,428.40, 403,451.40 and 256,986.80

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Solution

The fourth proportional to 269,428.40, 403,451.40 and 256,986.80 is: 384,820.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,428.40 : 403,451.40 = 256,986.80 : x
  2. Step 2: Convert to fraction form
    269,428.40/403,451.40 = 256,986.80/x
  3. Step 3: Cross multiply
    269,428.40x = 403,451.40 × 256,986.80
  4. Step 4: Simplify right side
    269,428.40x = 103,681,684,241.52
  5. Step 5: Solve for x
    x = 103,681,684,241.52/269,428.40
  6. Step 6: Final answer
    x = 384,820.92

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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.