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Finding the Fourth Proportional to 1,051.58, 1,575.57 and 742.84

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Solution

The fourth proportional to 1,051.58, 1,575.57 and 742.84 is: 1,112.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,051.58 : 1,575.57 = 742.84 : x
  2. Step 2: Convert to fraction form
    1,051.58/1,575.57 = 742.84/x
  3. Step 3: Cross multiply
    1,051.58x = 1,575.57 × 742.84
  4. Step 4: Simplify right side
    1,051.58x = 1,170,395.27
  5. Step 5: Solve for x
    x = 1,170,395.27/1,051.58
  6. Step 6: Final answer
    x = 1,112.99

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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.