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Finding the Fourth Proportional to 940.83, 1,411.23 and 393.39

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Solution

The fourth proportional to 940.83, 1,411.23 and 393.39 is: 590.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.83 : 1,411.23 = 393.39 : x
  2. Step 2: Convert to fraction form
    940.83/1,411.23 = 393.39/x
  3. Step 3: Cross multiply
    940.83x = 1,411.23 × 393.39
  4. Step 4: Simplify right side
    940.83x = 555,163.77
  5. Step 5: Solve for x
    x = 555,163.77/940.83
  6. Step 6: Final answer
    x = 590.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.