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Finding the Fourth Proportional to 807.12, 1,210.50 and 482.58

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Solution

The fourth proportional to 807.12, 1,210.50 and 482.58 is: 723.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    807.12 : 1,210.50 = 482.58 : x
  2. Step 2: Convert to fraction form
    807.12/1,210.50 = 482.58/x
  3. Step 3: Cross multiply
    807.12x = 1,210.50 × 482.58
  4. Step 4: Simplify right side
    807.12x = 584,163.09
  5. Step 5: Solve for x
    x = 584,163.09/807.12
  6. Step 6: Final answer
    x = 723.76

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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.