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Finding the Fourth Proportional to 737.38, 1,106.36 and 390.70

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Solution

The fourth proportional to 737.38, 1,106.36 and 390.70 is: 586.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    737.38 : 1,106.36 = 390.70 : x
  2. Step 2: Convert to fraction form
    737.38/1,106.36 = 390.70/x
  3. Step 3: Cross multiply
    737.38x = 1,106.36 × 390.70
  4. Step 4: Simplify right side
    737.38x = 432,254.85
  5. Step 5: Solve for x
    x = 432,254.85/737.38
  6. Step 6: Final answer
    x = 586.20

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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.