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Finding the Fourth Proportional to 710,067.52, 979,896.79 and 387,777.63

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Solution

The fourth proportional to 710,067.52, 979,896.79 and 387,777.63 is: 535,135.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,067.52 : 979,896.79 = 387,777.63 : x
  2. Step 2: Convert to fraction form
    710,067.52/979,896.79 = 387,777.63/x
  3. Step 3: Cross multiply
    710,067.52x = 979,896.79 × 387,777.63
  4. Step 4: Simplify right side
    710,067.52x = 379,982,053,518.22
  5. Step 5: Solve for x
    x = 379,982,053,518.22/710,067.52
  6. Step 6: Final answer
    x = 535,135.10

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1.5x scale

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.