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Finding the Fourth Proportional to 698.21, 962.92 and 488.28

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Solution

The fourth proportional to 698.21, 962.92 and 488.28 is: 673.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.21 : 962.92 = 488.28 : x
  2. Step 2: Convert to fraction form
    698.21/962.92 = 488.28/x
  3. Step 3: Cross multiply
    698.21x = 962.92 × 488.28
  4. Step 4: Simplify right side
    698.21x = 470,174.58
  5. Step 5: Solve for x
    x = 470,174.58/698.21
  6. Step 6: Final answer
    x = 673.40

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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.