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Finding the Fourth Proportional to 618.85, 853.93 and 370.18

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Solution

The fourth proportional to 618.85, 853.93 and 370.18 is: 510.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.85 : 853.93 = 370.18 : x
  2. Step 2: Convert to fraction form
    618.85/853.93 = 370.18/x
  3. Step 3: Cross multiply
    618.85x = 853.93 × 370.18
  4. Step 4: Simplify right side
    618.85x = 316,107.81
  5. Step 5: Solve for x
    x = 316,107.81/618.85
  6. Step 6: Final answer
    x = 510.80

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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.