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Finding the Fourth Proportional to 621.81, 858.03 and 342.03

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Solution

The fourth proportional to 621.81, 858.03 and 342.03 is: 471.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.81 : 858.03 = 342.03 : x
  2. Step 2: Convert to fraction form
    621.81/858.03 = 342.03/x
  3. Step 3: Cross multiply
    621.81x = 858.03 × 342.03
  4. Step 4: Simplify right side
    621.81x = 293,472.00
  5. Step 5: Solve for x
    x = 293,472.00/621.81
  6. Step 6: Final answer
    x = 471.96

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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.