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Finding the Fourth Proportional to 619.55, 853.85 and 601.78

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Solution

The fourth proportional to 619.55, 853.85 and 601.78 is: 829.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.55 : 853.85 = 601.78 : x
  2. Step 2: Convert to fraction form
    619.55/853.85 = 601.78/x
  3. Step 3: Cross multiply
    619.55x = 853.85 × 601.78
  4. Step 4: Simplify right side
    619.55x = 513,822.57
  5. Step 5: Solve for x
    x = 513,822.57/619.55
  6. Step 6: Final answer
    x = 829.35

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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.