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Finding the Fourth Proportional to 642, 886.28 and 603.60

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Solution

The fourth proportional to 642, 886.28 and 603.60 is: 833.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    642 : 886.28 = 603.60 : x
  2. Step 2: Convert to fraction form
    642/886.28 = 603.60/x
  3. Step 3: Cross multiply
    642x = 886.28 × 603.60
  4. Step 4: Simplify right side
    642x = 534,958.61
  5. Step 5: Solve for x
    x = 534,958.61/642
  6. Step 6: Final answer
    x = 833.27

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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.