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Finding the Fourth Proportional to 910.10, 1,362.63 and 663.59

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Solution

The fourth proportional to 910.10, 1,362.63 and 663.59 is: 993.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.10 : 1,362.63 = 663.59 : x
  2. Step 2: Convert to fraction form
    910.10/1,362.63 = 663.59/x
  3. Step 3: Cross multiply
    910.10x = 1,362.63 × 663.59
  4. Step 4: Simplify right side
    910.10x = 904,227.64
  5. Step 5: Solve for x
    x = 904,227.64/910.10
  6. Step 6: Final answer
    x = 993.55

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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.