Home / 715,849.14-987,872.45-393,564.72

Finding the Fourth Proportional to 715,849.14, 987,872.45 and 393,564.72

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Solution

The fourth proportional to 715,849.14, 987,872.45 and 393,564.72 is: 543,119.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,849.14 : 987,872.45 = 393,564.72 : x
  2. Step 2: Convert to fraction form
    715,849.14/987,872.45 = 393,564.72/x
  3. Step 3: Cross multiply
    715,849.14x = 987,872.45 × 393,564.72
  4. Step 4: Simplify right side
    715,849.14x = 388,791,742,212.14
  5. Step 5: Solve for x
    x = 388,791,742,212.14/715,849.14
  6. Step 6: Final answer
    x = 543,119.66

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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.