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Finding the Fourth Proportional to 709,367.20, 978,950.36 and 387,094.97

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Solution

The fourth proportional to 709,367.20, 978,950.36 and 387,094.97 is: 534,203.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,367.20 : 978,950.36 = 387,094.97 : x
  2. Step 2: Convert to fraction form
    709,367.20/978,950.36 = 387,094.97/x
  3. Step 3: Cross multiply
    709,367.20x = 978,950.36 × 387,094.97
  4. Step 4: Simplify right side
    709,367.20x = 378,946,763,650.80
  5. Step 5: Solve for x
    x = 378,946,763,650.80/709,367.20
  6. Step 6: Final answer
    x = 534,203.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.