Home / 2,419.08-3,628.62-687.66

Finding the Fourth Proportional to 2,419.08, 3,628.62 and 687.66

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Solution

The fourth proportional to 2,419.08, 3,628.62 and 687.66 is: 1,031.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,419.08 : 3,628.62 = 687.66 : x
  2. Step 2: Convert to fraction form
    2,419.08/3,628.62 = 687.66/x
  3. Step 3: Cross multiply
    2,419.08x = 3,628.62 × 687.66
  4. Step 4: Simplify right side
    2,419.08x = 2,495,256.83
  5. Step 5: Solve for x
    x = 2,495,256.83/2,419.08
  6. Step 6: Final answer
    x = 1,031.49

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1.5x scale

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.