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Finding the Fourth Proportional to 497.54, 685.87 and 418.57

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Solution

The fourth proportional to 497.54, 685.87 and 418.57 is: 577.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    497.54 : 685.87 = 418.57 : x
  2. Step 2: Convert to fraction form
    497.54/685.87 = 418.57/x
  3. Step 3: Cross multiply
    497.54x = 685.87 × 418.57
  4. Step 4: Simplify right side
    497.54x = 287,081.84
  5. Step 5: Solve for x
    x = 287,081.84/497.54
  6. Step 6: Final answer
    x = 577.00

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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.