Home / 1,421.90-2,132.49-556.22

Finding the Fourth Proportional to 1,421.90, 2,132.49 and 556.22

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Solution

The fourth proportional to 1,421.90, 2,132.49 and 556.22 is: 834.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.90 : 2,132.49 = 556.22 : x
  2. Step 2: Convert to fraction form
    1,421.90/2,132.49 = 556.22/x
  3. Step 3: Cross multiply
    1,421.90x = 2,132.49 × 556.22
  4. Step 4: Simplify right side
    1,421.90x = 1,186,133.59
  5. Step 5: Solve for x
    x = 1,186,133.59/1,421.90
  6. Step 6: Final answer
    x = 834.19

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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.