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Finding the Fourth Proportional to 710,067.84, 979,888.64 and 387,778.02

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Solution

The fourth proportional to 710,067.84, 979,888.64 and 387,778.02 is: 535,130.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,067.84 : 979,888.64 = 387,778.02 : x
  2. Step 2: Convert to fraction form
    710,067.84/979,888.64 = 387,778.02/x
  3. Step 3: Cross multiply
    710,067.84x = 979,888.64 × 387,778.02
  4. Step 4: Simplify right side
    710,067.84x = 379,979,274,700.80
  5. Step 5: Solve for x
    x = 379,979,274,700.80/710,067.84
  6. Step 6: Final answer
    x = 535,130.95

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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.