Home / 1,311.42-1,966.53-618.28

Finding the Fourth Proportional to 1,311.42, 1,966.53 and 618.28

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Solution

The fourth proportional to 1,311.42, 1,966.53 and 618.28 is: 927.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311.42 : 1,966.53 = 618.28 : x
  2. Step 2: Convert to fraction form
    1,311.42/1,966.53 = 618.28/x
  3. Step 3: Cross multiply
    1,311.42x = 1,966.53 × 618.28
  4. Step 4: Simplify right side
    1,311.42x = 1,215,866.17
  5. Step 5: Solve for x
    x = 1,215,866.17/1,311.42
  6. Step 6: Final answer
    x = 927.14

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1.5x scale

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.