Home / 1,297.28-1,787.66-942.60

Finding the Fourth Proportional to 1,297.28, 1,787.66 and 942.60

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Solution

The fourth proportional to 1,297.28, 1,787.66 and 942.60 is: 1,298.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,297.28 : 1,787.66 = 942.60 : x
  2. Step 2: Convert to fraction form
    1,297.28/1,787.66 = 942.60/x
  3. Step 3: Cross multiply
    1,297.28x = 1,787.66 × 942.60
  4. Step 4: Simplify right side
    1,297.28x = 1,685,048.32
  5. Step 5: Solve for x
    x = 1,685,048.32/1,297.28
  6. Step 6: Final answer
    x = 1,298.91

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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.