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Finding the Fourth Proportional to 642.86, 887.00 and 377.22

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Solution

The fourth proportional to 642.86, 887.00 and 377.22 is: 520.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.86 : 887.00 = 377.22 : x
  2. Step 2: Convert to fraction form
    642.86/887.00 = 377.22/x
  3. Step 3: Cross multiply
    642.86x = 887.00 × 377.22
  4. Step 4: Simplify right side
    642.86x = 334,592.25
  5. Step 5: Solve for x
    x = 334,592.25/642.86
  6. Step 6: Final answer
    x = 520.48

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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.