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Finding the Fourth Proportional to 342,693.28, 472,851.12 and 221,817.79

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Solution

The fourth proportional to 342,693.28, 472,851.12 and 221,817.79 is: 306,066.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,693.28 : 472,851.12 = 221,817.79 : x
  2. Step 2: Convert to fraction form
    342,693.28/472,851.12 = 221,817.79/x
  3. Step 3: Cross multiply
    342,693.28x = 472,851.12 × 221,817.79
  4. Step 4: Simplify right side
    342,693.28x = 104,886,790,612.58
  5. Step 5: Solve for x
    x = 104,886,790,612.58/342,693.28
  6. Step 6: Final answer
    x = 306,066.08

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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.