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Finding the Fourth Proportional to 690.09, 1,034.91 and 202.98

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Solution

The fourth proportional to 690.09, 1,034.91 and 202.98 is: 304.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    690.09 : 1,034.91 = 202.98 : x
  2. Step 2: Convert to fraction form
    690.09/1,034.91 = 202.98/x
  3. Step 3: Cross multiply
    690.09x = 1,034.91 × 202.98
  4. Step 4: Simplify right side
    690.09x = 210,066.03
  5. Step 5: Solve for x
    x = 210,066.03/690.09
  6. Step 6: Final answer
    x = 304.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.