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Finding the Fourth Proportional to 804.62, 1,206.75 and 342.47

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Solution

The fourth proportional to 804.62, 1,206.75 and 342.47 is: 513.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.62 : 1,206.75 = 342.47 : x
  2. Step 2: Convert to fraction form
    804.62/1,206.75 = 342.47/x
  3. Step 3: Cross multiply
    804.62x = 1,206.75 × 342.47
  4. Step 4: Simplify right side
    804.62x = 413,275.67
  5. Step 5: Solve for x
    x = 413,275.67/804.62
  6. Step 6: Final answer
    x = 513.63

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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.