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Finding the Fourth Proportional to 858.09, 1,184.17 and 465.12

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Solution

The fourth proportional to 858.09, 1,184.17 and 465.12 is: 641.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    858.09 : 1,184.17 = 465.12 : x
  2. Step 2: Convert to fraction form
    858.09/1,184.17 = 465.12/x
  3. Step 3: Cross multiply
    858.09x = 1,184.17 × 465.12
  4. Step 4: Simplify right side
    858.09x = 550,777.53
  5. Step 5: Solve for x
    x = 550,777.53/858.09
  6. Step 6: Final answer
    x = 641.86

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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.