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Finding the Fourth Proportional to 390,811.52, 585,611.98 and 271,101.29

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Solution

The fourth proportional to 390,811.52, 585,611.98 and 271,101.29 is: 406,232.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,811.52 : 585,611.98 = 271,101.29 : x
  2. Step 2: Convert to fraction form
    390,811.52/585,611.98 = 271,101.29/x
  3. Step 3: Cross multiply
    390,811.52x = 585,611.98 × 271,101.29
  4. Step 4: Simplify right side
    390,811.52x = 158,760,163,217.45
  5. Step 5: Solve for x
    x = 158,760,163,217.45/390,811.52
  6. Step 6: Final answer
    x = 406,232.05

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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.