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Finding the Fourth Proportional to 762.70, 1,051.86 and 554.26

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Solution

The fourth proportional to 762.70, 1,051.86 and 554.26 is: 764.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.70 : 1,051.86 = 554.26 : x
  2. Step 2: Convert to fraction form
    762.70/1,051.86 = 554.26/x
  3. Step 3: Cross multiply
    762.70x = 1,051.86 × 554.26
  4. Step 4: Simplify right side
    762.70x = 583,003.92
  5. Step 5: Solve for x
    x = 583,003.92/762.70
  6. Step 6: Final answer
    x = 764.39

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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.