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Finding the Fourth Proportional to 1,052.29, 1,578.45 and 619.75

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Solution

The fourth proportional to 1,052.29, 1,578.45 and 619.75 is: 929.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,052.29 : 1,578.45 = 619.75 : x
  2. Step 2: Convert to fraction form
    1,052.29/1,578.45 = 619.75/x
  3. Step 3: Cross multiply
    1,052.29x = 1,578.45 × 619.75
  4. Step 4: Simplify right side
    1,052.29x = 978,244.39
  5. Step 5: Solve for x
    x = 978,244.39/1,052.29
  6. Step 6: Final answer
    x = 929.63

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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.