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Finding the Fourth Proportional to 930.54, 1,395.98 and 443.63

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Solution

The fourth proportional to 930.54, 1,395.98 and 443.63 is: 665.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.54 : 1,395.98 = 443.63 : x
  2. Step 2: Convert to fraction form
    930.54/1,395.98 = 443.63/x
  3. Step 3: Cross multiply
    930.54x = 1,395.98 × 443.63
  4. Step 4: Simplify right side
    930.54x = 619,296.19
  5. Step 5: Solve for x
    x = 619,296.19/930.54
  6. Step 6: Final answer
    x = 665.52

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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.