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Finding the Fourth Proportional to 652,205.60, 978,308.40 and 439,629.20

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Solution

The fourth proportional to 652,205.60, 978,308.40 and 439,629.20 is: 659,443.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,205.60 : 978,308.40 = 439,629.20 : x
  2. Step 2: Convert to fraction form
    652,205.60/978,308.40 = 439,629.20/x
  3. Step 3: Cross multiply
    652,205.60x = 978,308.40 × 439,629.20
  4. Step 4: Simplify right side
    652,205.60x = 430,092,939,245.28
  5. Step 5: Solve for x
    x = 430,092,939,245.28/652,205.60
  6. Step 6: Final answer
    x = 659,443.80

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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.