Home / 1,378.10-2,066.57-556.15

Finding the Fourth Proportional to 1,378.10, 2,066.57 and 556.15

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Solution

The fourth proportional to 1,378.10, 2,066.57 and 556.15 is: 833.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378.10 : 2,066.57 = 556.15 : x
  2. Step 2: Convert to fraction form
    1,378.10/2,066.57 = 556.15/x
  3. Step 3: Cross multiply
    1,378.10x = 2,066.57 × 556.15
  4. Step 4: Simplify right side
    1,378.10x = 1,149,322.91
  5. Step 5: Solve for x
    x = 1,149,322.91/1,378.10
  6. Step 6: Final answer
    x = 833.99

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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.