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Finding the Fourth Proportional to 380.64, 525.27 and 231.40

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Solution

The fourth proportional to 380.64, 525.27 and 231.40 is: 319.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.64 : 525.27 = 231.40 : x
  2. Step 2: Convert to fraction form
    380.64/525.27 = 231.40/x
  3. Step 3: Cross multiply
    380.64x = 525.27 × 231.40
  4. Step 4: Simplify right side
    380.64x = 121,547.48
  5. Step 5: Solve for x
    x = 121,547.48/380.64
  6. Step 6: Final answer
    x = 319.32

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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.