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Finding the Fourth Proportional to 431.53, 595.61 and 281.89

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Solution

The fourth proportional to 431.53, 595.61 and 281.89 is: 389.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    431.53 : 595.61 = 281.89 : x
  2. Step 2: Convert to fraction form
    431.53/595.61 = 281.89/x
  3. Step 3: Cross multiply
    431.53x = 595.61 × 281.89
  4. Step 4: Simplify right side
    431.53x = 167,896.50
  5. Step 5: Solve for x
    x = 167,896.50/431.53
  6. Step 6: Final answer
    x = 389.07

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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.