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Finding the Fourth Proportional to 940.82, 1,298.40 and 567.89

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Solution

The fourth proportional to 940.82, 1,298.40 and 567.89 is: 783.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    940.82 : 1,298.40 = 567.89 : x
  2. Step 2: Convert to fraction form
    940.82/1,298.40 = 567.89/x
  3. Step 3: Cross multiply
    940.82x = 1,298.40 × 567.89
  4. Step 4: Simplify right side
    940.82x = 737,348.38
  5. Step 5: Solve for x
    x = 737,348.38/940.82
  6. Step 6: Final answer
    x = 783.73

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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.