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Finding the Fourth Proportional to 329,643.60, 494,465.40 and 261,992.40

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Solution

The fourth proportional to 329,643.60, 494,465.40 and 261,992.40 is: 392,988.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,643.60 : 494,465.40 = 261,992.40 : x
  2. Step 2: Convert to fraction form
    329,643.60/494,465.40 = 261,992.40/x
  3. Step 3: Cross multiply
    329,643.60x = 494,465.40 × 261,992.40
  4. Step 4: Simplify right side
    329,643.60x = 129,546,176,862.96
  5. Step 5: Solve for x
    x = 129,546,176,862.96/329,643.60
  6. Step 6: Final answer
    x = 392,988.60

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Similar ratio
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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.