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Finding the Fourth Proportional to 810.06, 1,213.91 and 462.32

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Solution

The fourth proportional to 810.06, 1,213.91 and 462.32 is: 692.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    810.06 : 1,213.91 = 462.32 : x
  2. Step 2: Convert to fraction form
    810.06/1,213.91 = 462.32/x
  3. Step 3: Cross multiply
    810.06x = 1,213.91 × 462.32
  4. Step 4: Simplify right side
    810.06x = 561,214.87
  5. Step 5: Solve for x
    x = 561,214.87/810.06
  6. Step 6: Final answer
    x = 692.81

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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.