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Finding the Fourth Proportional to 269,432.40, 403,457.40 and 256,990.80

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Solution

The fourth proportional to 269,432.40, 403,457.40 and 256,990.80 is: 384,826.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,432.40 : 403,457.40 = 256,990.80 : x
  2. Step 2: Convert to fraction form
    269,432.40/403,457.40 = 256,990.80/x
  3. Step 3: Cross multiply
    269,432.40x = 403,457.40 × 256,990.80
  4. Step 4: Simplify right side
    269,432.40x = 103,684,839,991.92
  5. Step 5: Solve for x
    x = 103,684,839,991.92/269,432.40
  6. Step 6: Final answer
    x = 384,826.92

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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.