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Finding the Fourth Proportional to 1,486.85, 2,051.57 and 823.67

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Solution

The fourth proportional to 1,486.85, 2,051.57 and 823.67 is: 1,136.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,486.85 : 2,051.57 = 823.67 : x
  2. Step 2: Convert to fraction form
    1,486.85/2,051.57 = 823.67/x
  3. Step 3: Cross multiply
    1,486.85x = 2,051.57 × 823.67
  4. Step 4: Simplify right side
    1,486.85x = 1,689,816.66
  5. Step 5: Solve for x
    x = 1,689,816.66/1,486.85
  6. Step 6: Final answer
    x = 1,136.51

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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.