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Finding the Fourth Proportional to 719.77, 1,074.48 and 672.84

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Solution

The fourth proportional to 719.77, 1,074.48 and 672.84 is: 1,004.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.77 : 1,074.48 = 672.84 : x
  2. Step 2: Convert to fraction form
    719.77/1,074.48 = 672.84/x
  3. Step 3: Cross multiply
    719.77x = 1,074.48 × 672.84
  4. Step 4: Simplify right side
    719.77x = 722,956.08
  5. Step 5: Solve for x
    x = 722,956.08/719.77
  6. Step 6: Final answer
    x = 1,004.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.