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Finding the Fourth Proportional to 729.42, 1,094.31 and 648.87

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Solution

The fourth proportional to 729.42, 1,094.31 and 648.87 is: 973.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    729.42 : 1,094.31 = 648.87 : x
  2. Step 2: Convert to fraction form
    729.42/1,094.31 = 648.87/x
  3. Step 3: Cross multiply
    729.42x = 1,094.31 × 648.87
  4. Step 4: Simplify right side
    729.42x = 710,064.93
  5. Step 5: Solve for x
    x = 710,064.93/729.42
  6. Step 6: Final answer
    x = 973.47

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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.