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Finding the Fourth Proportional to 946.27, 1,306.09 and 647.38

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Solution

The fourth proportional to 946.27, 1,306.09 and 647.38 is: 893.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    946.27 : 1,306.09 = 647.38 : x
  2. Step 2: Convert to fraction form
    946.27/1,306.09 = 647.38/x
  3. Step 3: Cross multiply
    946.27x = 1,306.09 × 647.38
  4. Step 4: Simplify right side
    946.27x = 845,536.54
  5. Step 5: Solve for x
    x = 845,536.54/946.27
  6. Step 6: Final answer
    x = 893.55

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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.