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Finding the Fourth Proportional to 437.74, 656.20 and 399.69

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Solution

The fourth proportional to 437.74, 656.20 and 399.69 is: 599.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.74 : 656.20 = 399.69 : x
  2. Step 2: Convert to fraction form
    437.74/656.20 = 399.69/x
  3. Step 3: Cross multiply
    437.74x = 656.20 × 399.69
  4. Step 4: Simplify right side
    437.74x = 262,271.30
  5. Step 5: Solve for x
    x = 262,271.30/437.74
  6. Step 6: Final answer
    x = 599.16

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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.