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Finding the Fourth Proportional to 807.93, 1,209.50 and 498.79

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Solution

The fourth proportional to 807.93, 1,209.50 and 498.79 is: 746.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    807.93 : 1,209.50 = 498.79 : x
  2. Step 2: Convert to fraction form
    807.93/1,209.50 = 498.79/x
  3. Step 3: Cross multiply
    807.93x = 1,209.50 × 498.79
  4. Step 4: Simplify right side
    807.93x = 603,282.23
  5. Step 5: Solve for x
    x = 603,282.23/807.93
  6. Step 6: Final answer
    x = 746.70

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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.