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Finding the Fourth Proportional to 952.16, 1,427.70 and 643.28

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Solution

The fourth proportional to 952.16, 1,427.70 and 643.28 is: 964.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    952.16 : 1,427.70 = 643.28 : x
  2. Step 2: Convert to fraction form
    952.16/1,427.70 = 643.28/x
  3. Step 3: Cross multiply
    952.16x = 1,427.70 × 643.28
  4. Step 4: Simplify right side
    952.16x = 918,410.86
  5. Step 5: Solve for x
    x = 918,410.86/952.16
  6. Step 6: Final answer
    x = 964.56

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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.