Home / 1,011.28-1,396.40-618.52

Finding the Fourth Proportional to 1,011.28, 1,396.40 and 618.52

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Solution

The fourth proportional to 1,011.28, 1,396.40 and 618.52 is: 854.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.28 : 1,396.40 = 618.52 : x
  2. Step 2: Convert to fraction form
    1,011.28/1,396.40 = 618.52/x
  3. Step 3: Cross multiply
    1,011.28x = 1,396.40 × 618.52
  4. Step 4: Simplify right side
    1,011.28x = 863,701.33
  5. Step 5: Solve for x
    x = 863,701.33/1,011.28
  6. Step 6: Final answer
    x = 854.07

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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.