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Finding the Fourth Proportional to 720,556.56, 994,371.96 and 393,870.02

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Solution

The fourth proportional to 720,556.56, 994,371.96 and 393,870.02 is: 543,542.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,556.56 : 994,371.96 = 393,870.02 : x
  2. Step 2: Convert to fraction form
    720,556.56/994,371.96 = 393,870.02/x
  3. Step 3: Cross multiply
    720,556.56x = 994,371.96 × 393,870.02
  4. Step 4: Simplify right side
    720,556.56x = 391,653,298,800.78
  5. Step 5: Solve for x
    x = 391,653,298,800.78/720,556.56
  6. Step 6: Final answer
    x = 543,542.76

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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.