Home / 1,421.60-2,131.72-544.07

Finding the Fourth Proportional to 1,421.60, 2,131.72 and 544.07

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Solution

The fourth proportional to 1,421.60, 2,131.72 and 544.07 is: 815.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.60 : 2,131.72 = 544.07 : x
  2. Step 2: Convert to fraction form
    1,421.60/2,131.72 = 544.07/x
  3. Step 3: Cross multiply
    1,421.60x = 2,131.72 × 544.07
  4. Step 4: Simplify right side
    1,421.60x = 1,159,796.88
  5. Step 5: Solve for x
    x = 1,159,796.88/1,421.60
  6. Step 6: Final answer
    x = 815.84

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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.