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Finding the Fourth Proportional to 943.94, 1,407.45 and 907.82

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Solution

The fourth proportional to 943.94, 1,407.45 and 907.82 is: 1,353.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.94 : 1,407.45 = 907.82 : x
  2. Step 2: Convert to fraction form
    943.94/1,407.45 = 907.82/x
  3. Step 3: Cross multiply
    943.94x = 1,407.45 × 907.82
  4. Step 4: Simplify right side
    943.94x = 1,277,706.72
  5. Step 5: Solve for x
    x = 1,277,706.72/943.94
  6. Step 6: Final answer
    x = 1,353.59

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.