Home / 1,238.32-1,707.48-927.28

Finding the Fourth Proportional to 1,238.32, 1,707.48 and 927.28

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Solution

The fourth proportional to 1,238.32, 1,707.48 and 927.28 is: 1,278.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238.32 : 1,707.48 = 927.28 : x
  2. Step 2: Convert to fraction form
    1,238.32/1,707.48 = 927.28/x
  3. Step 3: Cross multiply
    1,238.32x = 1,707.48 × 927.28
  4. Step 4: Simplify right side
    1,238.32x = 1,583,312.05
  5. Step 5: Solve for x
    x = 1,583,312.05/1,238.32
  6. Step 6: Final answer
    x = 1,278.60

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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.