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Finding the Fourth Proportional to 739.16, 1,106.76 and 391.77

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Solution

The fourth proportional to 739.16, 1,106.76 and 391.77 is: 586.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.16 : 1,106.76 = 391.77 : x
  2. Step 2: Convert to fraction form
    739.16/1,106.76 = 391.77/x
  3. Step 3: Cross multiply
    739.16x = 1,106.76 × 391.77
  4. Step 4: Simplify right side
    739.16x = 433,595.37
  5. Step 5: Solve for x
    x = 433,595.37/739.16
  6. Step 6: Final answer
    x = 586.61

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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.