Home / 715,947.27-988,010.91-393,678.15

Finding the Fourth Proportional to 715,947.27, 988,010.91 and 393,678.15

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Solution

The fourth proportional to 715,947.27, 988,010.91 and 393,678.15 is: 543,277.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,947.27 : 988,010.91 = 393,678.15 : x
  2. Step 2: Convert to fraction form
    715,947.27/988,010.91 = 393,678.15/x
  3. Step 3: Cross multiply
    715,947.27x = 988,010.91 × 393,678.15
  4. Step 4: Simplify right side
    715,947.27x = 388,958,307,228.62
  5. Step 5: Solve for x
    x = 388,958,307,228.62/715,947.27
  6. Step 6: Final answer
    x = 543,277.87

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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.