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Finding the Fourth Proportional to 439,269.94, 659,443.56 and 289,635.40

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Solution

The fourth proportional to 439,269.94, 659,443.56 and 289,635.40 is: 434,808.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,269.94 : 659,443.56 = 289,635.40 : x
  2. Step 2: Convert to fraction form
    439,269.94/659,443.56 = 289,635.40/x
  3. Step 3: Cross multiply
    439,269.94x = 659,443.56 × 289,635.40
  4. Step 4: Simplify right side
    439,269.94x = 190,998,199,278.02
  5. Step 5: Solve for x
    x = 190,998,199,278.02/439,269.94
  6. Step 6: Final answer
    x = 434,808.26

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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.