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Finding the Fourth Proportional to 719.51, 1,077.12 and 444.71

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Solution

The fourth proportional to 719.51, 1,077.12 and 444.71 is: 665.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.51 : 1,077.12 = 444.71 : x
  2. Step 2: Convert to fraction form
    719.51/1,077.12 = 444.71/x
  3. Step 3: Cross multiply
    719.51x = 1,077.12 × 444.71
  4. Step 4: Simplify right side
    719.51x = 479,000.65
  5. Step 5: Solve for x
    x = 479,000.65/719.51
  6. Step 6: Final answer
    x = 665.74

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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.