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Finding the Fourth Proportional to 688.98, 950.67 and 427.08

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Solution

The fourth proportional to 688.98, 950.67 and 427.08 is: 589.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.98 : 950.67 = 427.08 : x
  2. Step 2: Convert to fraction form
    688.98/950.67 = 427.08/x
  3. Step 3: Cross multiply
    688.98x = 950.67 × 427.08
  4. Step 4: Simplify right side
    688.98x = 406,012.14
  5. Step 5: Solve for x
    x = 406,012.14/688.98
  6. Step 6: Final answer
    x = 589.29

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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.