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Finding the Fourth Proportional to 580.51, 801.25 and 391.49

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Solution

The fourth proportional to 580.51, 801.25 and 391.49 is: 540.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.51 : 801.25 = 391.49 : x
  2. Step 2: Convert to fraction form
    580.51/801.25 = 391.49/x
  3. Step 3: Cross multiply
    580.51x = 801.25 × 391.49
  4. Step 4: Simplify right side
    580.51x = 313,677.36
  5. Step 5: Solve for x
    x = 313,677.36/580.51
  6. Step 6: Final answer
    x = 540.35

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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.