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Finding the Fourth Proportional to 888.21, 1,225.40 and 608.90

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Solution

The fourth proportional to 888.21, 1,225.40 and 608.90 is: 840.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.21 : 1,225.40 = 608.90 : x
  2. Step 2: Convert to fraction form
    888.21/1,225.40 = 608.90/x
  3. Step 3: Cross multiply
    888.21x = 1,225.40 × 608.90
  4. Step 4: Simplify right side
    888.21x = 746,136.89
  5. Step 5: Solve for x
    x = 746,136.89/888.21
  6. Step 6: Final answer
    x = 840.05

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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.