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Finding the Fourth Proportional to 652,296.70, 978,445.05 and 439,720.30

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Solution

The fourth proportional to 652,296.70, 978,445.05 and 439,720.30 is: 659,580.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,296.70 : 978,445.05 = 439,720.30 : x
  2. Step 2: Convert to fraction form
    652,296.70/978,445.05 = 439,720.30/x
  3. Step 3: Cross multiply
    652,296.70x = 978,445.05 × 439,720.30
  4. Step 4: Simplify right side
    652,296.70x = 430,242,150,919.52
  5. Step 5: Solve for x
    x = 430,242,150,919.52/652,296.70
  6. Step 6: Final answer
    x = 659,580.45

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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.