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Finding the Fourth Proportional to 698.88, 1,048.32 and 266.34

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Solution

The fourth proportional to 698.88, 1,048.32 and 266.34 is: 399.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.88 : 1,048.32 = 266.34 : x
  2. Step 2: Convert to fraction form
    698.88/1,048.32 = 266.34/x
  3. Step 3: Cross multiply
    698.88x = 1,048.32 × 266.34
  4. Step 4: Simplify right side
    698.88x = 279,209.55
  5. Step 5: Solve for x
    x = 279,209.55/698.88
  6. Step 6: Final answer
    x = 399.51

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Double scale
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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.