Home / 1,276.24-1,913.62-398.49

Finding the Fourth Proportional to 1,276.24, 1,913.62 and 398.49

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Solution

The fourth proportional to 1,276.24, 1,913.62 and 398.49 is: 597.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.24 : 1,913.62 = 398.49 : x
  2. Step 2: Convert to fraction form
    1,276.24/1,913.62 = 398.49/x
  3. Step 3: Cross multiply
    1,276.24x = 1,913.62 × 398.49
  4. Step 4: Simplify right side
    1,276.24x = 762,558.43
  5. Step 5: Solve for x
    x = 762,558.43/1,276.24
  6. Step 6: Final answer
    x = 597.50

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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.