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Finding the Fourth Proportional to 949.99, 1,418.11 and 820.82

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Solution

The fourth proportional to 949.99, 1,418.11 and 820.82 is: 1,225.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.99 : 1,418.11 = 820.82 : x
  2. Step 2: Convert to fraction form
    949.99/1,418.11 = 820.82/x
  3. Step 3: Cross multiply
    949.99x = 1,418.11 × 820.82
  4. Step 4: Simplify right side
    949.99x = 1,164,019.16
  5. Step 5: Solve for x
    x = 1,164,019.16/949.99
  6. Step 6: Final answer
    x = 1,225.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.