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Finding the Fourth Proportional to 385,409.84, 532,020.12 and 254,568.56

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Solution

The fourth proportional to 385,409.84, 532,020.12 and 254,568.56 is: 351,406.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,409.84 : 532,020.12 = 254,568.56 : x
  2. Step 2: Convert to fraction form
    385,409.84/532,020.12 = 254,568.56/x
  3. Step 3: Cross multiply
    385,409.84x = 532,020.12 × 254,568.56
  4. Step 4: Simplify right side
    385,409.84x = 135,435,595,839.43
  5. Step 5: Solve for x
    x = 135,435,595,839.43/385,409.84
  6. Step 6: Final answer
    x = 351,406.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.