Home / 1,211.18-1,815.94-625.94

Finding the Fourth Proportional to 1,211.18, 1,815.94 and 625.94

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Solution

The fourth proportional to 1,211.18, 1,815.94 and 625.94 is: 938.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.18 : 1,815.94 = 625.94 : x
  2. Step 2: Convert to fraction form
    1,211.18/1,815.94 = 625.94/x
  3. Step 3: Cross multiply
    1,211.18x = 1,815.94 × 625.94
  4. Step 4: Simplify right side
    1,211.18x = 1,136,657.27
  5. Step 5: Solve for x
    x = 1,136,657.27/1,211.18
  6. Step 6: Final answer
    x = 938.47

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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.