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Finding the Fourth Proportional to 957.30, 1,428.38 and 888.45

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Solution

The fourth proportional to 957.30, 1,428.38 and 888.45 is: 1,325.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.30 : 1,428.38 = 888.45 : x
  2. Step 2: Convert to fraction form
    957.30/1,428.38 = 888.45/x
  3. Step 3: Cross multiply
    957.30x = 1,428.38 × 888.45
  4. Step 4: Simplify right side
    957.30x = 1,269,039.77
  5. Step 5: Solve for x
    x = 1,269,039.77/957.30
  6. Step 6: Final answer
    x = 1,325.64

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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.