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Finding the Fourth Proportional to 926.12, 1,276.91 and 704.69

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Solution

The fourth proportional to 926.12, 1,276.91 and 704.69 is: 971.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.12 : 1,276.91 = 704.69 : x
  2. Step 2: Convert to fraction form
    926.12/1,276.91 = 704.69/x
  3. Step 3: Cross multiply
    926.12x = 1,276.91 × 704.69
  4. Step 4: Simplify right side
    926.12x = 899,815.80
  5. Step 5: Solve for x
    x = 899,815.80/926.12
  6. Step 6: Final answer
    x = 971.60

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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.