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Finding the Fourth Proportional to 619.05, 927.55 and 435.55

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Solution

The fourth proportional to 619.05, 927.55 and 435.55 is: 652.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.05 : 927.55 = 435.55 : x
  2. Step 2: Convert to fraction form
    619.05/927.55 = 435.55/x
  3. Step 3: Cross multiply
    619.05x = 927.55 × 435.55
  4. Step 4: Simplify right side
    619.05x = 403,987.59
  5. Step 5: Solve for x
    x = 403,987.59/619.05
  6. Step 6: Final answer
    x = 652.60

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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.