Home / 715,637.15-987,586.79-388,950.11

Finding the Fourth Proportional to 715,637.15, 987,586.79 and 388,950.11

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Solution

The fourth proportional to 715,637.15, 987,586.79 and 388,950.11 is: 536,755.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,637.15 : 987,586.79 = 388,950.11 : x
  2. Step 2: Convert to fraction form
    715,637.15/987,586.79 = 388,950.11/x
  3. Step 3: Cross multiply
    715,637.15x = 987,586.79 × 388,950.11
  4. Step 4: Simplify right side
    715,637.15x = 384,121,990,605.05
  5. Step 5: Solve for x
    x = 384,121,990,605.05/715,637.15
  6. Step 6: Final answer
    x = 536,755.24

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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.