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Finding the Fourth Proportional to 745.86, 1,118.79 and 334.91

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Solution

The fourth proportional to 745.86, 1,118.79 and 334.91 is: 502.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.86 : 1,118.79 = 334.91 : x
  2. Step 2: Convert to fraction form
    745.86/1,118.79 = 334.91/x
  3. Step 3: Cross multiply
    745.86x = 1,118.79 × 334.91
  4. Step 4: Simplify right side
    745.86x = 374,688.36
  5. Step 5: Solve for x
    x = 374,688.36/745.86
  6. Step 6: Final answer
    x = 502.36

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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.