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Finding the Fourth Proportional to 743.07, 1,025.79 and 494.80

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Solution

The fourth proportional to 743.07, 1,025.79 and 494.80 is: 683.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    743.07 : 1,025.79 = 494.80 : x
  2. Step 2: Convert to fraction form
    743.07/1,025.79 = 494.80/x
  3. Step 3: Cross multiply
    743.07x = 1,025.79 × 494.80
  4. Step 4: Simplify right side
    743.07x = 507,560.89
  5. Step 5: Solve for x
    x = 507,560.89/743.07
  6. Step 6: Final answer
    x = 683.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.