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Finding the Fourth Proportional to 642.45, 886.36 and 524.22

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Solution

The fourth proportional to 642.45, 886.36 and 524.22 is: 723.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.45 : 886.36 = 524.22 : x
  2. Step 2: Convert to fraction form
    642.45/886.36 = 524.22/x
  3. Step 3: Cross multiply
    642.45x = 886.36 × 524.22
  4. Step 4: Simplify right side
    642.45x = 464,647.64
  5. Step 5: Solve for x
    x = 464,647.64/642.45
  6. Step 6: Final answer
    x = 723.24

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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.