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Finding the Fourth Proportional to 623.60, 934.60 and 478.60

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Solution

The fourth proportional to 623.60, 934.60 and 478.60 is: 717.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.60 : 934.60 = 478.60 : x
  2. Step 2: Convert to fraction form
    623.60/934.60 = 478.60/x
  3. Step 3: Cross multiply
    623.60x = 934.60 × 478.60
  4. Step 4: Simplify right side
    623.60x = 447,299.56
  5. Step 5: Solve for x
    x = 447,299.56/623.60
  6. Step 6: Final answer
    x = 717.29

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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.