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Finding the Fourth Proportional to 1,070.53, 1,603.67 and 851.54

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Solution

The fourth proportional to 1,070.53, 1,603.67 and 851.54 is: 1,275.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,070.53 : 1,603.67 = 851.54 : x
  2. Step 2: Convert to fraction form
    1,070.53/1,603.67 = 851.54/x
  3. Step 3: Cross multiply
    1,070.53x = 1,603.67 × 851.54
  4. Step 4: Simplify right side
    1,070.53x = 1,365,576.88
  5. Step 5: Solve for x
    x = 1,365,576.88/1,070.53
  6. Step 6: Final answer
    x = 1,275.61

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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.