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Finding the Fourth Proportional to 620.60, 929.68 and 376.40

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Solution

The fourth proportional to 620.60, 929.68 and 376.40 is: 563.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.60 : 929.68 = 376.40 : x
  2. Step 2: Convert to fraction form
    620.60/929.68 = 376.40/x
  3. Step 3: Cross multiply
    620.60x = 929.68 × 376.40
  4. Step 4: Simplify right side
    620.60x = 349,931.55
  5. Step 5: Solve for x
    x = 349,931.55/620.60
  6. Step 6: Final answer
    x = 563.86

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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.