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Finding the Fourth Proportional to 619.68, 851.66 and 602.40

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Solution

The fourth proportional to 619.68, 851.66 and 602.40 is: 827.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.68 : 851.66 = 602.40 : x
  2. Step 2: Convert to fraction form
    619.68/851.66 = 602.40/x
  3. Step 3: Cross multiply
    619.68x = 851.66 × 602.40
  4. Step 4: Simplify right side
    619.68x = 513,039.98
  5. Step 5: Solve for x
    x = 513,039.98/619.68
  6. Step 6: Final answer
    x = 827.91

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.