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Finding the Fourth Proportional to 619.20, 919.20 and 593.28

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Solution

The fourth proportional to 619.20, 919.20 and 593.28 is: 880.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.20 : 919.20 = 593.28 : x
  2. Step 2: Convert to fraction form
    619.20/919.20 = 593.28/x
  3. Step 3: Cross multiply
    619.20x = 919.20 × 593.28
  4. Step 4: Simplify right side
    619.20x = 545,342.98
  5. Step 5: Solve for x
    x = 545,342.98/619.20
  6. Step 6: Final answer
    x = 880.72

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.