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Finding the Fourth Proportional to 573.29, 790.21 and 386.72

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Solution

The fourth proportional to 573.29, 790.21 and 386.72 is: 533.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.29 : 790.21 = 386.72 : x
  2. Step 2: Convert to fraction form
    573.29/790.21 = 386.72/x
  3. Step 3: Cross multiply
    573.29x = 790.21 × 386.72
  4. Step 4: Simplify right side
    573.29x = 305,585.09
  5. Step 5: Solve for x
    x = 305,585.09/573.29
  6. Step 6: Final answer
    x = 533.04

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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.