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Finding the Fourth Proportional to 719.95, 1,079.46 and 395.23

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Solution

The fourth proportional to 719.95, 1,079.46 and 395.23 is: 592.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.95 : 1,079.46 = 395.23 : x
  2. Step 2: Convert to fraction form
    719.95/1,079.46 = 395.23/x
  3. Step 3: Cross multiply
    719.95x = 1,079.46 × 395.23
  4. Step 4: Simplify right side
    719.95x = 426,634.98
  5. Step 5: Solve for x
    x = 426,634.98/719.95
  6. Step 6: Final answer
    x = 592.59

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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.