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Finding the Fourth Proportional to 291.60, 435.58 and 230.55

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Solution

The fourth proportional to 291.60, 435.58 and 230.55 is: 344.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.60 : 435.58 = 230.55 : x
  2. Step 2: Convert to fraction form
    291.60/435.58 = 230.55/x
  3. Step 3: Cross multiply
    291.60x = 435.58 × 230.55
  4. Step 4: Simplify right side
    291.60x = 100,420.76
  5. Step 5: Solve for x
    x = 100,420.76/291.60
  6. Step 6: Final answer
    x = 344.38

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.