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Finding the Fourth Proportional to 715,040.33, 986,762.79 and 388,359.70

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Solution

The fourth proportional to 715,040.33, 986,762.79 and 388,359.70 is: 535,940.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,040.33 : 986,762.79 = 388,359.70 : x
  2. Step 2: Convert to fraction form
    715,040.33/986,762.79 = 388,359.70/x
  3. Step 3: Cross multiply
    715,040.33x = 986,762.79 × 388,359.70
  4. Step 4: Simplify right side
    715,040.33x = 383,218,898,628.66
  5. Step 5: Solve for x
    x = 383,218,898,628.66/715,040.33
  6. Step 6: Final answer
    x = 535,940.26

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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.