Home / 1,356.19-1,871.63-766.73

Finding the Fourth Proportional to 1,356.19, 1,871.63 and 766.73

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Solution

The fourth proportional to 1,356.19, 1,871.63 and 766.73 is: 1,058.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,356.19 : 1,871.63 = 766.73 : x
  2. Step 2: Convert to fraction form
    1,356.19/1,871.63 = 766.73/x
  3. Step 3: Cross multiply
    1,356.19x = 1,871.63 × 766.73
  4. Step 4: Simplify right side
    1,356.19x = 1,435,027.43
  5. Step 5: Solve for x
    x = 1,435,027.43/1,356.19
  6. Step 6: Final answer
    x = 1,058.13

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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.