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Finding the Fourth Proportional to 858.26, 1,184.40 and 465.29

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Solution

The fourth proportional to 858.26, 1,184.40 and 465.29 is: 642.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    858.26 : 1,184.40 = 465.29 : x
  2. Step 2: Convert to fraction form
    858.26/1,184.40 = 465.29/x
  3. Step 3: Cross multiply
    858.26x = 1,184.40 × 465.29
  4. Step 4: Simplify right side
    858.26x = 551,083.55
  5. Step 5: Solve for x
    x = 551,083.55/858.26
  6. Step 6: Final answer
    x = 642.10

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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.