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Finding the Fourth Proportional to 642.96, 887.25 and 373.86

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Solution

The fourth proportional to 642.96, 887.25 and 373.86 is: 515.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.96 : 887.25 = 373.86 : x
  2. Step 2: Convert to fraction form
    642.96/887.25 = 373.86/x
  3. Step 3: Cross multiply
    642.96x = 887.25 × 373.86
  4. Step 4: Simplify right side
    642.96x = 331,707.29
  5. Step 5: Solve for x
    x = 331,707.29/642.96
  6. Step 6: Final answer
    x = 515.91

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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.