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Finding the Fourth Proportional to 652,219.20, 978,328.80 and 439,642.80

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Solution

The fourth proportional to 652,219.20, 978,328.80 and 439,642.80 is: 659,464.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,219.20 : 978,328.80 = 439,642.80 : x
  2. Step 2: Convert to fraction form
    652,219.20/978,328.80 = 439,642.80/x
  3. Step 3: Cross multiply
    652,219.20x = 978,328.80 × 439,642.80
  4. Step 4: Simplify right side
    652,219.20x = 430,115,212,952.64
  5. Step 5: Solve for x
    x = 430,115,212,952.64/652,219.20
  6. Step 6: Final answer
    x = 659,464.20

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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.