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Finding the Fourth Proportional to 572.32, 790.28 and 490.24

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Solution

The fourth proportional to 572.32, 790.28 and 490.24 is: 676.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.32 : 790.28 = 490.24 : x
  2. Step 2: Convert to fraction form
    572.32/790.28 = 490.24/x
  3. Step 3: Cross multiply
    572.32x = 790.28 × 490.24
  4. Step 4: Simplify right side
    572.32x = 387,426.87
  5. Step 5: Solve for x
    x = 387,426.87/572.32
  6. Step 6: Final answer
    x = 676.94

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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.