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Finding the Fourth Proportional to 354,622.76, 489,307.72 and 225,612.44

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Solution

The fourth proportional to 354,622.76, 489,307.72 and 225,612.44 is: 311,299.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,622.76 : 489,307.72 = 225,612.44 : x
  2. Step 2: Convert to fraction form
    354,622.76/489,307.72 = 225,612.44/x
  3. Step 3: Cross multiply
    354,622.76x = 489,307.72 × 225,612.44
  4. Step 4: Simplify right side
    354,622.76x = 110,393,908,620.04
  5. Step 5: Solve for x
    x = 110,393,908,620.04/354,622.76
  6. Step 6: Final answer
    x = 311,299.56

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1.5x scale

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.