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Finding the Fourth Proportional to 326,258.90, 489,364.05 and 136,670.30

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Solution

The fourth proportional to 326,258.90, 489,364.05 and 136,670.30 is: 204,995.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,258.90 : 489,364.05 = 136,670.30 : x
  2. Step 2: Convert to fraction form
    326,258.90/489,364.05 = 136,670.30/x
  3. Step 3: Cross multiply
    326,258.90x = 489,364.05 × 136,670.30
  4. Step 4: Simplify right side
    326,258.90x = 66,881,531,522.72
  5. Step 5: Solve for x
    x = 66,881,531,522.72/326,258.90
  6. Step 6: Final answer
    x = 204,995.27

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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.