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Finding the Fourth Proportional to 620.53, 929.40 and 576.79

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Solution

The fourth proportional to 620.53, 929.40 and 576.79 is: 863.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.53 : 929.40 = 576.79 : x
  2. Step 2: Convert to fraction form
    620.53/929.40 = 576.79/x
  3. Step 3: Cross multiply
    620.53x = 929.40 × 576.79
  4. Step 4: Simplify right side
    620.53x = 536,068.63
  5. Step 5: Solve for x
    x = 536,068.63/620.53
  6. Step 6: Final answer
    x = 863.89

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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.