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Finding the Fourth Proportional to 943.07, 1,297.62 and 918.92

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Solution

The fourth proportional to 943.07, 1,297.62 and 918.92 is: 1,264.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.07 : 1,297.62 = 918.92 : x
  2. Step 2: Convert to fraction form
    943.07/1,297.62 = 918.92/x
  3. Step 3: Cross multiply
    943.07x = 1,297.62 × 918.92
  4. Step 4: Simplify right side
    943.07x = 1,192,408.56
  5. Step 5: Solve for x
    x = 1,192,408.56/943.07
  6. Step 6: Final answer
    x = 1,264.39

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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.