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Finding the Fourth Proportional to 619.57, 854.58 and 370.72

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Solution

The fourth proportional to 619.57, 854.58 and 370.72 is: 511.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.57 : 854.58 = 370.72 : x
  2. Step 2: Convert to fraction form
    619.57/854.58 = 370.72/x
  3. Step 3: Cross multiply
    619.57x = 854.58 × 370.72
  4. Step 4: Simplify right side
    619.57x = 316,809.90
  5. Step 5: Solve for x
    x = 316,809.90/619.57
  6. Step 6: Final answer
    x = 511.34

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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.