Home / 1,631.74-2,447.64-399.16

Finding the Fourth Proportional to 1,631.74, 2,447.64 and 399.16

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Solution

The fourth proportional to 1,631.74, 2,447.64 and 399.16 is: 598.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,631.74 : 2,447.64 = 399.16 : x
  2. Step 2: Convert to fraction form
    1,631.74/2,447.64 = 399.16/x
  3. Step 3: Cross multiply
    1,631.74x = 2,447.64 × 399.16
  4. Step 4: Simplify right side
    1,631.74x = 976,999.98
  5. Step 5: Solve for x
    x = 976,999.98/1,631.74
  6. Step 6: Final answer
    x = 598.75

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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.