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Finding the Fourth Proportional to 907.18, 1,251.37 and 611.93

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Solution

The fourth proportional to 907.18, 1,251.37 and 611.93 is: 844.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    907.18 : 1,251.37 = 611.93 : x
  2. Step 2: Convert to fraction form
    907.18/1,251.37 = 611.93/x
  3. Step 3: Cross multiply
    907.18x = 1,251.37 × 611.93
  4. Step 4: Simplify right side
    907.18x = 765,750.84
  5. Step 5: Solve for x
    x = 765,750.84/907.18
  6. Step 6: Final answer
    x = 844.10

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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.