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Finding the Fourth Proportional to 427.79, 590.35 and 231.30

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Solution

The fourth proportional to 427.79, 590.35 and 231.30 is: 319.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.79 : 590.35 = 231.30 : x
  2. Step 2: Convert to fraction form
    427.79/590.35 = 231.30/x
  3. Step 3: Cross multiply
    427.79x = 590.35 × 231.30
  4. Step 4: Simplify right side
    427.79x = 136,547.16
  5. Step 5: Solve for x
    x = 136,547.16/427.79
  6. Step 6: Final answer
    x = 319.19

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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.