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Finding the Fourth Proportional to 797.15, 1,099.64 and 502.31

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Solution

The fourth proportional to 797.15, 1,099.64 and 502.31 is: 692.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    797.15 : 1,099.64 = 502.31 : x
  2. Step 2: Convert to fraction form
    797.15/1,099.64 = 502.31/x
  3. Step 3: Cross multiply
    797.15x = 1,099.64 × 502.31
  4. Step 4: Simplify right side
    797.15x = 552,364.17
  5. Step 5: Solve for x
    x = 552,364.17/797.15
  6. Step 6: Final answer
    x = 692.92

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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.