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Finding the Fourth Proportional to 807.19, 1,210.78 and 230.06

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Solution

The fourth proportional to 807.19, 1,210.78 and 230.06 is: 345.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    807.19 : 1,210.78 = 230.06 : x
  2. Step 2: Convert to fraction form
    807.19/1,210.78 = 230.06/x
  3. Step 3: Cross multiply
    807.19x = 1,210.78 × 230.06
  4. Step 4: Simplify right side
    807.19x = 278,555.36
  5. Step 5: Solve for x
    x = 278,555.36/807.19
  6. Step 6: Final answer
    x = 345.09

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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.