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Finding the Fourth Proportional to 673.28, 926.88 and 642.32

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Solution

The fourth proportional to 673.28, 926.88 and 642.32 is: 884.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    673.28 : 926.88 = 642.32 : x
  2. Step 2: Convert to fraction form
    673.28/926.88 = 642.32/x
  3. Step 3: Cross multiply
    673.28x = 926.88 × 642.32
  4. Step 4: Simplify right side
    673.28x = 595,353.56
  5. Step 5: Solve for x
    x = 595,353.56/673.28
  6. Step 6: Final answer
    x = 884.26

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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.