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Finding the Fourth Proportional to 889.45, 1,333.35 and 395.60

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Solution

The fourth proportional to 889.45, 1,333.35 and 395.60 is: 593.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.45 : 1,333.35 = 395.60 : x
  2. Step 2: Convert to fraction form
    889.45/1,333.35 = 395.60/x
  3. Step 3: Cross multiply
    889.45x = 1,333.35 × 395.60
  4. Step 4: Simplify right side
    889.45x = 527,467.61
  5. Step 5: Solve for x
    x = 527,467.61/889.45
  6. Step 6: Final answer
    x = 593.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.