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Finding the Fourth Proportional to 823.99, 1,136.77 and 525.15

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Solution

The fourth proportional to 823.99, 1,136.77 and 525.15 is: 724.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    823.99 : 1,136.77 = 525.15 : x
  2. Step 2: Convert to fraction form
    823.99/1,136.77 = 525.15/x
  3. Step 3: Cross multiply
    823.99x = 1,136.77 × 525.15
  4. Step 4: Simplify right side
    823.99x = 596,974.77
  5. Step 5: Solve for x
    x = 596,974.77/823.99
  6. Step 6: Final answer
    x = 724.49

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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.