Home / 715,677.35-987,618.02-388,982.61

Finding the Fourth Proportional to 715,677.35, 987,618.02 and 388,982.61

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Solution

The fourth proportional to 715,677.35, 987,618.02 and 388,982.61 is: 536,786.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,677.35 : 987,618.02 = 388,982.61 : x
  2. Step 2: Convert to fraction form
    715,677.35/987,618.02 = 388,982.61/x
  3. Step 3: Cross multiply
    715,677.35x = 987,618.02 × 388,982.61
  4. Step 4: Simplify right side
    715,677.35x = 384,166,233,157.72
  5. Step 5: Solve for x
    x = 384,166,233,157.72/715,677.35
  6. Step 6: Final answer
    x = 536,786.91

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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.