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Finding the Fourth Proportional to 573.20, 790.43 and 490.58

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Solution

The fourth proportional to 573.20, 790.43 and 490.58 is: 676.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.20 : 790.43 = 490.58 : x
  2. Step 2: Convert to fraction form
    573.20/790.43 = 490.58/x
  3. Step 3: Cross multiply
    573.20x = 790.43 × 490.58
  4. Step 4: Simplify right side
    573.20x = 387,768.67
  5. Step 5: Solve for x
    x = 387,768.67/573.20
  6. Step 6: Final answer
    x = 676.50

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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.