Home / 1,011.18-1,396.13-618.47

Finding the Fourth Proportional to 1,011.18, 1,396.13 and 618.47

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Solution

The fourth proportional to 1,011.18, 1,396.13 and 618.47 is: 853.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.18 : 1,396.13 = 618.47 : x
  2. Step 2: Convert to fraction form
    1,011.18/1,396.13 = 618.47/x
  3. Step 3: Cross multiply
    1,011.18x = 1,396.13 × 618.47
  4. Step 4: Simplify right side
    1,011.18x = 863,454.45
  5. Step 5: Solve for x
    x = 863,454.45/1,011.18
  6. Step 6: Final answer
    x = 853.91

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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.