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Finding the Fourth Proportional to 957.88, 1,435.22 and 921.88

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Solution

The fourth proportional to 957.88, 1,435.22 and 921.88 is: 1,381.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.88 : 1,435.22 = 921.88 : x
  2. Step 2: Convert to fraction form
    957.88/1,435.22 = 921.88/x
  3. Step 3: Cross multiply
    957.88x = 1,435.22 × 921.88
  4. Step 4: Simplify right side
    957.88x = 1,323,100.61
  5. Step 5: Solve for x
    x = 1,323,100.61/957.88
  6. Step 6: Final answer
    x = 1,381.28

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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.