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Finding the Fourth Proportional to 652,207.60, 978,311.40 and 278,959.60

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Solution

The fourth proportional to 652,207.60, 978,311.40 and 278,959.60 is: 418,439.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,207.60 : 978,311.40 = 278,959.60 : x
  2. Step 2: Convert to fraction form
    652,207.60/978,311.40 = 278,959.60/x
  3. Step 3: Cross multiply
    652,207.60x = 978,311.40 × 278,959.60
  4. Step 4: Simplify right side
    652,207.60x = 272,909,356,819.44
  5. Step 5: Solve for x
    x = 272,909,356,819.44/652,207.60
  6. Step 6: Final answer
    x = 418,439.40

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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.