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Finding the Fourth Proportional to 572.36, 790.25 and 423

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Solution

The fourth proportional to 572.36, 790.25 and 423 is: 584.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.36 : 790.25 = 423 : x
  2. Step 2: Convert to fraction form
    572.36/790.25 = 423/x
  3. Step 3: Cross multiply
    572.36x = 790.25 × 423
  4. Step 4: Simplify right side
    572.36x = 334,275.75
  5. Step 5: Solve for x
    x = 334,275.75/572.36
  6. Step 6: Final answer
    x = 584.03

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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.