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Finding the Fourth Proportional to 745.70, 1,118.25 and 437.63

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Solution

The fourth proportional to 745.70, 1,118.25 and 437.63 is: 656.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.70 : 1,118.25 = 437.63 : x
  2. Step 2: Convert to fraction form
    745.70/1,118.25 = 437.63/x
  3. Step 3: Cross multiply
    745.70x = 1,118.25 × 437.63
  4. Step 4: Simplify right side
    745.70x = 489,374.16
  5. Step 5: Solve for x
    x = 489,374.16/745.70
  6. Step 6: Final answer
    x = 656.27

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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.