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Finding the Fourth Proportional to 710,067.09, 979,887.60 and 387,777.27

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Solution

The fourth proportional to 710,067.09, 979,887.60 and 387,777.27 is: 535,129.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,067.09 : 979,887.60 = 387,777.27 : x
  2. Step 2: Convert to fraction form
    710,067.09/979,887.60 = 387,777.27/x
  3. Step 3: Cross multiply
    710,067.09x = 979,887.60 × 387,777.27
  4. Step 4: Simplify right side
    710,067.09x = 379,978,138,434.85
  5. Step 5: Solve for x
    x = 379,978,138,434.85/710,067.09
  6. Step 6: Final answer
    x = 535,129.91

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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.