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Finding the Fourth Proportional to 797.51, 1,193.70 and 426.39

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Solution

The fourth proportional to 797.51, 1,193.70 and 426.39 is: 638.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    797.51 : 1,193.70 = 426.39 : x
  2. Step 2: Convert to fraction form
    797.51/1,193.70 = 426.39/x
  3. Step 3: Cross multiply
    797.51x = 1,193.70 × 426.39
  4. Step 4: Simplify right side
    797.51x = 508,985.58
  5. Step 5: Solve for x
    x = 508,985.58/797.51
  6. Step 6: Final answer
    x = 638.22

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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.