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Finding the Fourth Proportional to 618.67, 853.04 and 507.79

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Solution

The fourth proportional to 618.67, 853.04 and 507.79 is: 700.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.67 : 853.04 = 507.79 : x
  2. Step 2: Convert to fraction form
    618.67/853.04 = 507.79/x
  3. Step 3: Cross multiply
    618.67x = 853.04 × 507.79
  4. Step 4: Simplify right side
    618.67x = 433,158.38
  5. Step 5: Solve for x
    x = 433,158.38/618.67
  6. Step 6: Final answer
    x = 700.15

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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.