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Finding the Fourth Proportional to 685.98, 946.68 and 423.96

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Solution

The fourth proportional to 685.98, 946.68 and 423.96 is: 585.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    685.98 : 946.68 = 423.96 : x
  2. Step 2: Convert to fraction form
    685.98/946.68 = 423.96/x
  3. Step 3: Cross multiply
    685.98x = 946.68 × 423.96
  4. Step 4: Simplify right side
    685.98x = 401,354.45
  5. Step 5: Solve for x
    x = 401,354.45/685.98
  6. Step 6: Final answer
    x = 585.08

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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.