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Finding the Fourth Proportional to 930.89, 1,285.50 and 599.89

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Solution

The fourth proportional to 930.89, 1,285.50 and 599.89 is: 828.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.89 : 1,285.50 = 599.89 : x
  2. Step 2: Convert to fraction form
    930.89/1,285.50 = 599.89/x
  3. Step 3: Cross multiply
    930.89x = 1,285.50 × 599.89
  4. Step 4: Simplify right side
    930.89x = 771,155.60
  5. Step 5: Solve for x
    x = 771,155.60/930.89
  6. Step 6: Final answer
    x = 828.41

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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.