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Finding the Fourth Proportional to 804.43, 1,205.38 and 479.62

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Solution

The fourth proportional to 804.43, 1,205.38 and 479.62 is: 718.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.43 : 1,205.38 = 479.62 : x
  2. Step 2: Convert to fraction form
    804.43/1,205.38 = 479.62/x
  3. Step 3: Cross multiply
    804.43x = 1,205.38 × 479.62
  4. Step 4: Simplify right side
    804.43x = 578,124.36
  5. Step 5: Solve for x
    x = 578,124.36/804.43
  6. Step 6: Final answer
    x = 718.68

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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.