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Finding the Fourth Proportional to 619.67, 854.86 and 370.87

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Solution

The fourth proportional to 619.67, 854.86 and 370.87 is: 511.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.67 : 854.86 = 370.87 : x
  2. Step 2: Convert to fraction form
    619.67/854.86 = 370.87/x
  3. Step 3: Cross multiply
    619.67x = 854.86 × 370.87
  4. Step 4: Simplify right side
    619.67x = 317,041.93
  5. Step 5: Solve for x
    x = 317,041.93/619.67
  6. Step 6: Final answer
    x = 511.63

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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.