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Finding the Fourth Proportional to 737.32, 1,106.44 and 390.91

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Solution

The fourth proportional to 737.32, 1,106.44 and 390.91 is: 586.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    737.32 : 1,106.44 = 390.91 : x
  2. Step 2: Convert to fraction form
    737.32/1,106.44 = 390.91/x
  3. Step 3: Cross multiply
    737.32x = 1,106.44 × 390.91
  4. Step 4: Simplify right side
    737.32x = 432,518.46
  5. Step 5: Solve for x
    x = 432,518.46/737.32
  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.