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Finding the Fourth Proportional to 489,258.40, 733,887.60 and 445,712.80

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Solution

The fourth proportional to 489,258.40, 733,887.60 and 445,712.80 is: 668,569.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,258.40 : 733,887.60 = 445,712.80 : x
  2. Step 2: Convert to fraction form
    489,258.40/733,887.60 = 445,712.80/x
  3. Step 3: Cross multiply
    489,258.40x = 733,887.60 × 445,712.80
  4. Step 4: Simplify right side
    489,258.40x = 327,103,097,081.28
  5. Step 5: Solve for x
    x = 327,103,097,081.28/489,258.40
  6. Step 6: Final answer
    x = 668,569.20

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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.