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Finding the Fourth Proportional to 955.32, 1,433.40 and 918.06

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Solution

The fourth proportional to 955.32, 1,433.40 and 918.06 is: 1,377.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.32 : 1,433.40 = 918.06 : x
  2. Step 2: Convert to fraction form
    955.32/1,433.40 = 918.06/x
  3. Step 3: Cross multiply
    955.32x = 1,433.40 × 918.06
  4. Step 4: Simplify right side
    955.32x = 1,315,947.20
  5. Step 5: Solve for x
    x = 1,315,947.20/955.32
  6. Step 6: Final answer
    x = 1,377.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.