Home / 715,914.72-987,953.45-393,622.02

Finding the Fourth Proportional to 715,914.72, 987,953.45 and 393,622.02

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Solution

The fourth proportional to 715,914.72, 987,953.45 and 393,622.02 is: 543,193.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,914.72 : 987,953.45 = 393,622.02 : x
  2. Step 2: Convert to fraction form
    715,914.72/987,953.45 = 393,622.02/x
  3. Step 3: Cross multiply
    715,914.72x = 987,953.45 × 393,622.02
  4. Step 4: Simplify right side
    715,914.72x = 388,880,230,686.86
  5. Step 5: Solve for x
    x = 388,880,230,686.86/715,914.72
  6. Step 6: Final answer
    x = 543,193.51

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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.