Home / 1,312.11-1,967.34-618.36

Finding the Fourth Proportional to 1,312.11, 1,967.34 and 618.36

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Solution

The fourth proportional to 1,312.11, 1,967.34 and 618.36 is: 927.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.11 : 1,967.34 = 618.36 : x
  2. Step 2: Convert to fraction form
    1,312.11/1,967.34 = 618.36/x
  3. Step 3: Cross multiply
    1,312.11x = 1,967.34 × 618.36
  4. Step 4: Simplify right side
    1,312.11x = 1,216,524.36
  5. Step 5: Solve for x
    x = 1,216,524.36/1,312.11
  6. Step 6: Final answer
    x = 927.15

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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.