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Finding the Fourth Proportional to 807.25, 1,211.48 and 591.39

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Solution

The fourth proportional to 807.25, 1,211.48 and 591.39 is: 887.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    807.25 : 1,211.48 = 591.39 : x
  2. Step 2: Convert to fraction form
    807.25/1,211.48 = 591.39/x
  3. Step 3: Cross multiply
    807.25x = 1,211.48 × 591.39
  4. Step 4: Simplify right side
    807.25x = 716,457.16
  5. Step 5: Solve for x
    x = 716,457.16/807.25
  6. Step 6: Final answer
    x = 887.53

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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.