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Finding the Fourth Proportional to 260,330.82, 390,554.84 and 91,863.15

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Solution

The fourth proportional to 260,330.82, 390,554.84 and 91,863.15 is: 137,815.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,330.82 : 390,554.84 = 91,863.15 : x
  2. Step 2: Convert to fraction form
    260,330.82/390,554.84 = 91,863.15/x
  3. Step 3: Cross multiply
    260,330.82x = 390,554.84 × 91,863.15
  4. Step 4: Simplify right side
    260,330.82x = 35,877,597,850.15
  5. Step 5: Solve for x
    x = 35,877,597,850.15/260,330.82
  6. Step 6: Final answer
    x = 137,815.41

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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.