Home / 1,914.28-2,641.53-1,117.78

Finding the Fourth Proportional to 1,914.28, 2,641.53 and 1,117.78

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Solution

The fourth proportional to 1,914.28, 2,641.53 and 1,117.78 is: 1,542.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,914.28 : 2,641.53 = 1,117.78 : x
  2. Step 2: Convert to fraction form
    1,914.28/2,641.53 = 1,117.78/x
  3. Step 3: Cross multiply
    1,914.28x = 2,641.53 × 1,117.78
  4. Step 4: Simplify right side
    1,914.28x = 2,952,649.40
  5. Step 5: Solve for x
    x = 2,952,649.40/1,914.28
  6. Step 6: Final answer
    x = 1,542.43

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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.