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Finding the Fourth Proportional to 380.59, 570.85 and 185.51

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Solution

The fourth proportional to 380.59, 570.85 and 185.51 is: 278.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.59 : 570.85 = 185.51 : x
  2. Step 2: Convert to fraction form
    380.59/570.85 = 185.51/x
  3. Step 3: Cross multiply
    380.59x = 570.85 × 185.51
  4. Step 4: Simplify right side
    380.59x = 105,899.35
  5. Step 5: Solve for x
    x = 105,899.35/380.59
  6. Step 6: Final answer
    x = 278.25

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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.