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Finding the Fourth Proportional to 652,119.10, 978,178.65 and 439,542.70

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Solution

The fourth proportional to 652,119.10, 978,178.65 and 439,542.70 is: 659,314.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,119.10 : 978,178.65 = 439,542.70 : x
  2. Step 2: Convert to fraction form
    652,119.10/978,178.65 = 439,542.70/x
  3. Step 3: Cross multiply
    652,119.10x = 978,178.65 × 439,542.70
  4. Step 4: Simplify right side
    652,119.10x = 429,951,284,903.36
  5. Step 5: Solve for x
    x = 429,951,284,903.36/652,119.10
  6. Step 6: Final answer
    x = 659,314.05

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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.