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Finding the Fourth Proportional to 623.98, 936 and 459.64

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Solution

The fourth proportional to 623.98, 936 and 459.64 is: 689.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.98 : 936 = 459.64 : x
  2. Step 2: Convert to fraction form
    623.98/936 = 459.64/x
  3. Step 3: Cross multiply
    623.98x = 936 × 459.64
  4. Step 4: Simplify right side
    623.98x = 430,223.04
  5. Step 5: Solve for x
    x = 430,223.04/623.98
  6. Step 6: Final answer
    x = 689.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.