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Finding the Fourth Proportional to 740.52, 1,110.78 and 192.70

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Solution

The fourth proportional to 740.52, 1,110.78 and 192.70 is: 289.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.52 : 1,110.78 = 192.70 : x
  2. Step 2: Convert to fraction form
    740.52/1,110.78 = 192.70/x
  3. Step 3: Cross multiply
    740.52x = 1,110.78 × 192.70
  4. Step 4: Simplify right side
    740.52x = 214,051.82
  5. Step 5: Solve for x
    x = 214,051.82/740.52
  6. Step 6: Final answer
    x = 289.06

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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.