Home / 1,651.37-2,278.95-905.40

Finding the Fourth Proportional to 1,651.37, 2,278.95 and 905.40

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Solution

The fourth proportional to 1,651.37, 2,278.95 and 905.40 is: 1,249.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,651.37 : 2,278.95 = 905.40 : x
  2. Step 2: Convert to fraction form
    1,651.37/2,278.95 = 905.40/x
  3. Step 3: Cross multiply
    1,651.37x = 2,278.95 × 905.40
  4. Step 4: Simplify right side
    1,651.37x = 2,063,349.94
  5. Step 5: Solve for x
    x = 2,063,349.94/1,651.37
  6. Step 6: Final answer
    x = 1,249.48

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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.