Home / 1,431.18-2,147.10-609.48

Finding the Fourth Proportional to 1,431.18, 2,147.10 and 609.48

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Solution

The fourth proportional to 1,431.18, 2,147.10 and 609.48 is: 914.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.18 : 2,147.10 = 609.48 : x
  2. Step 2: Convert to fraction form
    1,431.18/2,147.10 = 609.48/x
  3. Step 3: Cross multiply
    1,431.18x = 2,147.10 × 609.48
  4. Step 4: Simplify right side
    1,431.18x = 1,308,614.51
  5. Step 5: Solve for x
    x = 1,308,614.51/1,431.18
  6. Step 6: Final answer
    x = 914.36

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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.