Home / 1,211.02-1,817.23-561.72

Finding the Fourth Proportional to 1,211.02, 1,817.23 and 561.72

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Solution

The fourth proportional to 1,211.02, 1,817.23 and 561.72 is: 842.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211.02 : 1,817.23 = 561.72 : x
  2. Step 2: Convert to fraction form
    1,211.02/1,817.23 = 561.72/x
  3. Step 3: Cross multiply
    1,211.02x = 1,817.23 × 561.72
  4. Step 4: Simplify right side
    1,211.02x = 1,020,774.44
  5. Step 5: Solve for x
    x = 1,020,774.44/1,211.02
  6. Step 6: Final answer
    x = 842.90

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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.