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Finding the Fourth Proportional to 922.12, 1,272.64 and 700.68

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Solution

The fourth proportional to 922.12, 1,272.64 and 700.68 is: 967.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.12 : 1,272.64 = 700.68 : x
  2. Step 2: Convert to fraction form
    922.12/1,272.64 = 700.68/x
  3. Step 3: Cross multiply
    922.12x = 1,272.64 × 700.68
  4. Step 4: Simplify right side
    922.12x = 891,713.40
  5. Step 5: Solve for x
    x = 891,713.40/922.12
  6. Step 6: Final answer
    x = 967.03

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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.