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Finding the Fourth Proportional to 1,051.18, 1,576.59 and 281.50

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Solution

The fourth proportional to 1,051.18, 1,576.59 and 281.50 is: 422.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,051.18 : 1,576.59 = 281.50 : x
  2. Step 2: Convert to fraction form
    1,051.18/1,576.59 = 281.50/x
  3. Step 3: Cross multiply
    1,051.18x = 1,576.59 × 281.50
  4. Step 4: Simplify right side
    1,051.18x = 443,810.09
  5. Step 5: Solve for x
    x = 443,810.09/1,051.18
  6. Step 6: Final answer
    x = 422.20

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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.