Home / 1,275.92-1,913.09-727.35

Finding the Fourth Proportional to 1,275.92, 1,913.09 and 727.35

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Solution

The fourth proportional to 1,275.92, 1,913.09 and 727.35 is: 1,090.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,275.92 : 1,913.09 = 727.35 : x
  2. Step 2: Convert to fraction form
    1,275.92/1,913.09 = 727.35/x
  3. Step 3: Cross multiply
    1,275.92x = 1,913.09 × 727.35
  4. Step 4: Simplify right side
    1,275.92x = 1,391,482.37
  5. Step 5: Solve for x
    x = 1,391,482.37/1,275.92
  6. Step 6: Final answer
    x = 1,090.58

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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.