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Finding the Fourth Proportional to 936.66, 1,292.73 and 907.98

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Solution

The fourth proportional to 936.66, 1,292.73 and 907.98 is: 1,253.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.66 : 1,292.73 = 907.98 : x
  2. Step 2: Convert to fraction form
    936.66/1,292.73 = 907.98/x
  3. Step 3: Cross multiply
    936.66x = 1,292.73 × 907.98
  4. Step 4: Simplify right side
    936.66x = 1,173,772.99
  5. Step 5: Solve for x
    x = 1,173,772.99/936.66
  6. Step 6: Final answer
    x = 1,253.15

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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.