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Finding the Fourth Proportional to 580.80, 801.18 and 394.50

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Solution

The fourth proportional to 580.80, 801.18 and 394.50 is: 544.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    580.80 : 801.18 = 394.50 : x
  2. Step 2: Convert to fraction form
    580.80/801.18 = 394.50/x
  3. Step 3: Cross multiply
    580.80x = 801.18 × 394.50
  4. Step 4: Simplify right side
    580.80x = 316,065.51
  5. Step 5: Solve for x
    x = 316,065.51/580.80
  6. Step 6: Final answer
    x = 544.19

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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.