Home / 1,421.36-2,132.64-556.28

Finding the Fourth Proportional to 1,421.36, 2,132.64 and 556.28

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Solution

The fourth proportional to 1,421.36, 2,132.64 and 556.28 is: 834.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,421.36 : 2,132.64 = 556.28 : x
  2. Step 2: Convert to fraction form
    1,421.36/2,132.64 = 556.28/x
  3. Step 3: Cross multiply
    1,421.36x = 2,132.64 × 556.28
  4. Step 4: Simplify right side
    1,421.36x = 1,186,344.98
  5. Step 5: Solve for x
    x = 1,186,344.98/1,421.36
  6. Step 6: Final answer
    x = 834.65

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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.