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Finding the Fourth Proportional to 740.65, 1,110.58 and 220.58

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Solution

The fourth proportional to 740.65, 1,110.58 and 220.58 is: 330.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    740.65 : 1,110.58 = 220.58 : x
  2. Step 2: Convert to fraction form
    740.65/1,110.58 = 220.58/x
  3. Step 3: Cross multiply
    740.65x = 1,110.58 × 220.58
  4. Step 4: Simplify right side
    740.65x = 244,971.74
  5. Step 5: Solve for x
    x = 244,971.74/740.65
  6. Step 6: Final answer
    x = 330.75

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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.