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Finding the Fourth Proportional to 342,670.69, 472,819.93 and 221,795.20

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Solution

The fourth proportional to 342,670.69, 472,819.93 and 221,795.20 is: 306,034.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,670.69 : 472,819.93 = 221,795.20 : x
  2. Step 2: Convert to fraction form
    342,670.69/472,819.93 = 221,795.20/x
  3. Step 3: Cross multiply
    342,670.69x = 472,819.93 × 221,795.20
  4. Step 4: Simplify right side
    342,670.69x = 104,869,190,938.34
  5. Step 5: Solve for x
    x = 104,869,190,938.34/342,670.69
  6. Step 6: Final answer
    x = 306,034.90

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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.