Home / 1,418.48-2,127.18-431.08

Finding the Fourth Proportional to 1,418.48, 2,127.18 and 431.08

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Solution

The fourth proportional to 1,418.48, 2,127.18 and 431.08 is: 646.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418.48 : 2,127.18 = 431.08 : x
  2. Step 2: Convert to fraction form
    1,418.48/2,127.18 = 431.08/x
  3. Step 3: Cross multiply
    1,418.48x = 2,127.18 × 431.08
  4. Step 4: Simplify right side
    1,418.48x = 916,984.75
  5. Step 5: Solve for x
    x = 916,984.75/1,418.48
  6. Step 6: Final answer
    x = 646.46

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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.