Home / 1,431.27-2,147.31-651.93

Finding the Fourth Proportional to 1,431.27, 2,147.31 and 651.93

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Solution

The fourth proportional to 1,431.27, 2,147.31 and 651.93 is: 978.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.27 : 2,147.31 = 651.93 : x
  2. Step 2: Convert to fraction form
    1,431.27/2,147.31 = 651.93/x
  3. Step 3: Cross multiply
    1,431.27x = 2,147.31 × 651.93
  4. Step 4: Simplify right side
    1,431.27x = 1,399,895.81
  5. Step 5: Solve for x
    x = 1,399,895.81/1,431.27
  6. Step 6: Final answer
    x = 978.08

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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.