Home / 1,913.91-2,640.18-1,127.49

Finding the Fourth Proportional to 1,913.91, 2,640.18 and 1,127.49

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Solution

The fourth proportional to 1,913.91, 2,640.18 and 1,127.49 is: 1,555.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,913.91 : 2,640.18 = 1,127.49 : x
  2. Step 2: Convert to fraction form
    1,913.91/2,640.18 = 1,127.49/x
  3. Step 3: Cross multiply
    1,913.91x = 2,640.18 × 1,127.49
  4. Step 4: Simplify right side
    1,913.91x = 2,976,776.55
  5. Step 5: Solve for x
    x = 2,976,776.55/1,913.91
  6. Step 6: Final answer
    x = 1,555.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.