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Finding the Fourth Proportional to 623.10, 934.79 and 289.38

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Solution

The fourth proportional to 623.10, 934.79 and 289.38 is: 434.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.10 : 934.79 = 289.38 : x
  2. Step 2: Convert to fraction form
    623.10/934.79 = 289.38/x
  3. Step 3: Cross multiply
    623.10x = 934.79 × 289.38
  4. Step 4: Simplify right side
    623.10x = 270,509.53
  5. Step 5: Solve for x
    x = 270,509.53/623.10
  6. Step 6: Final answer
    x = 434.14

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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.