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Finding the Fourth Proportional to 573.28, 790.78 and 340.36

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Solution

The fourth proportional to 573.28, 790.78 and 340.36 is: 469.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.28 : 790.78 = 340.36 : x
  2. Step 2: Convert to fraction form
    573.28/790.78 = 340.36/x
  3. Step 3: Cross multiply
    573.28x = 790.78 × 340.36
  4. Step 4: Simplify right side
    573.28x = 269,149.88
  5. Step 5: Solve for x
    x = 269,149.88/573.28
  6. Step 6: Final answer
    x = 469.49

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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.