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Finding the Fourth Proportional to 619.70, 854.76 and 370.85

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Solution

The fourth proportional to 619.70, 854.76 and 370.85 is: 511.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.70 : 854.76 = 370.85 : x
  2. Step 2: Convert to fraction form
    619.70/854.76 = 370.85/x
  3. Step 3: Cross multiply
    619.70x = 854.76 × 370.85
  4. Step 4: Simplify right side
    619.70x = 316,983.47
  5. Step 5: Solve for x
    x = 316,983.47/619.70
  6. Step 6: Final answer
    x = 511.52

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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.