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Finding the Fourth Proportional to 1,052.79, 1,579.20 and 620.25

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Solution

The fourth proportional to 1,052.79, 1,579.20 and 620.25 is: 930.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,052.79 : 1,579.20 = 620.25 : x
  2. Step 2: Convert to fraction form
    1,052.79/1,579.20 = 620.25/x
  3. Step 3: Cross multiply
    1,052.79x = 1,579.20 × 620.25
  4. Step 4: Simplify right side
    1,052.79x = 979,498.80
  5. Step 5: Solve for x
    x = 979,498.80/1,052.79
  6. Step 6: Final answer
    x = 930.38

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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.