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Finding the Fourth Proportional to 715,937.94, 987,998.72 and 393,650.69

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Solution

The fourth proportional to 715,937.94, 987,998.72 and 393,650.69 is: 543,240.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,937.94 : 987,998.72 = 393,650.69 : x
  2. Step 2: Convert to fraction form
    715,937.94/987,998.72 = 393,650.69/x
  3. Step 3: Cross multiply
    715,937.94x = 987,998.72 × 393,650.69
  4. Step 4: Simplify right side
    715,937.94x = 388,926,370,938.87
  5. Step 5: Solve for x
    x = 388,926,370,938.87/715,937.94
  6. Step 6: Final answer
    x = 543,240.34

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Double scale
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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.