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Finding the Fourth Proportional to 715,863.03, 987,897.74 and 393,575.37

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Solution

The fourth proportional to 715,863.03, 987,897.74 and 393,575.37 is: 543,137.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,863.03 : 987,897.74 = 393,575.37 : x
  2. Step 2: Convert to fraction form
    715,863.03/987,897.74 = 393,575.37/x
  3. Step 3: Cross multiply
    715,863.03x = 987,897.74 × 393,575.37
  4. Step 4: Simplify right side
    715,863.03x = 388,812,216,574.79
  5. Step 5: Solve for x
    x = 388,812,216,574.79/715,863.03
  6. Step 6: Final answer
    x = 543,137.72

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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.