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Finding the Fourth Proportional to 619.64, 855.10 and 350.47

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Solution

The fourth proportional to 619.64, 855.10 and 350.47 is: 483.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.64 : 855.10 = 350.47 : x
  2. Step 2: Convert to fraction form
    619.64/855.10 = 350.47/x
  3. Step 3: Cross multiply
    619.64x = 855.10 × 350.47
  4. Step 4: Simplify right side
    619.64x = 299,686.90
  5. Step 5: Solve for x
    x = 299,686.90/619.64
  6. Step 6: Final answer
    x = 483.65

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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.