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Finding the Fourth Proportional to 719.07, 1,079.09 and 394.67

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Solution

The fourth proportional to 719.07, 1,079.09 and 394.67 is: 592.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.07 : 1,079.09 = 394.67 : x
  2. Step 2: Convert to fraction form
    719.07/1,079.09 = 394.67/x
  3. Step 3: Cross multiply
    719.07x = 1,079.09 × 394.67
  4. Step 4: Simplify right side
    719.07x = 425,877.08
  5. Step 5: Solve for x
    x = 425,877.08/719.07
  6. Step 6: Final answer
    x = 592.26

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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.