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Finding the Fourth Proportional to 652,199.60, 978,299.40 and 439,623.20

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Solution

The fourth proportional to 652,199.60, 978,299.40 and 439,623.20 is: 659,434.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,199.60 : 978,299.40 = 439,623.20 : x
  2. Step 2: Convert to fraction form
    652,199.60/978,299.40 = 439,623.20/x
  3. Step 3: Cross multiply
    652,199.60x = 978,299.40 × 439,623.20
  4. Step 4: Simplify right side
    652,199.60x = 430,083,112,786.08
  5. Step 5: Solve for x
    x = 430,083,112,786.08/652,199.60
  6. Step 6: Final answer
    x = 659,434.80

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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.