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Finding the Fourth Proportional to 608.43, 840.77 and 497.87

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Solution

The fourth proportional to 608.43, 840.77 and 497.87 is: 687.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.43 : 840.77 = 497.87 : x
  2. Step 2: Convert to fraction form
    608.43/840.77 = 497.87/x
  3. Step 3: Cross multiply
    608.43x = 840.77 × 497.87
  4. Step 4: Simplify right side
    608.43x = 418,589.96
  5. Step 5: Solve for x
    x = 418,589.96/608.43
  6. Step 6: Final answer
    x = 687.98

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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.