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Finding the Fourth Proportional to 439,473.60, 659,647.80 and 215,087.40

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Solution

The fourth proportional to 439,473.60, 659,647.80 and 215,087.40 is: 322,845.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,473.60 : 659,647.80 = 215,087.40 : x
  2. Step 2: Convert to fraction form
    439,473.60/659,647.80 = 215,087.40/x
  3. Step 3: Cross multiply
    439,473.60x = 659,647.80 × 215,087.40
  4. Step 4: Simplify right side
    439,473.60x = 141,881,930,217.72
  5. Step 5: Solve for x
    x = 141,881,930,217.72/439,473.60
  6. Step 6: Final answer
    x = 322,845.17

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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.