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Finding the Fourth Proportional to 642.96, 888.75 and 591.93

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Solution

The fourth proportional to 642.96, 888.75 and 591.93 is: 818.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    642.96 : 888.75 = 591.93 : x
  2. Step 2: Convert to fraction form
    642.96/888.75 = 591.93/x
  3. Step 3: Cross multiply
    642.96x = 888.75 × 591.93
  4. Step 4: Simplify right side
    642.96x = 526,078.53
  5. Step 5: Solve for x
    x = 526,078.53/642.96
  6. Step 6: Final answer
    x = 818.21

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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.