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Finding the Fourth Proportional to 922.72, 1,269.84 and 859.36

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Solution

The fourth proportional to 922.72, 1,269.84 and 859.36 is: 1,182.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.72 : 1,269.84 = 859.36 : x
  2. Step 2: Convert to fraction form
    922.72/1,269.84 = 859.36/x
  3. Step 3: Cross multiply
    922.72x = 1,269.84 × 859.36
  4. Step 4: Simplify right side
    922.72x = 1,091,249.70
  5. Step 5: Solve for x
    x = 1,091,249.70/922.72
  6. Step 6: Final answer
    x = 1,182.64

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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.