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Finding the Fourth Proportional to 619.28, 852.32 and 545.12

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Solution

The fourth proportional to 619.28, 852.32 and 545.12 is: 750.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.28 : 852.32 = 545.12 : x
  2. Step 2: Convert to fraction form
    619.28/852.32 = 545.12/x
  3. Step 3: Cross multiply
    619.28x = 852.32 × 545.12
  4. Step 4: Simplify right side
    619.28x = 464,616.68
  5. Step 5: Solve for x
    x = 464,616.68/619.28
  6. Step 6: Final answer
    x = 750.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.