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Finding the Fourth Proportional to 907.27, 1,252.08 and 685.83

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Solution

The fourth proportional to 907.27, 1,252.08 and 685.83 is: 946.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.27 : 1,252.08 = 685.83 : x
  2. Step 2: Convert to fraction form
    907.27/1,252.08 = 685.83/x
  3. Step 3: Cross multiply
    907.27x = 1,252.08 × 685.83
  4. Step 4: Simplify right side
    907.27x = 858,714.03
  5. Step 5: Solve for x
    x = 858,714.03/907.27
  6. Step 6: Final answer
    x = 946.48

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1.5x scale

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.