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Finding the Fourth Proportional to 804.36, 1,210.20 and 479.97

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Solution

The fourth proportional to 804.36, 1,210.20 and 479.97 is: 722.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    804.36 : 1,210.20 = 479.97 : x
  2. Step 2: Convert to fraction form
    804.36/1,210.20 = 479.97/x
  3. Step 3: Cross multiply
    804.36x = 1,210.20 × 479.97
  4. Step 4: Simplify right side
    804.36x = 580,859.69
  5. Step 5: Solve for x
    x = 580,859.69/804.36
  6. Step 6: Final answer
    x = 722.14

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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.