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Finding the Fourth Proportional to 646,840.80, 969,915.60 and 272,440.80

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Solution

The fourth proportional to 646,840.80, 969,915.60 and 272,440.80 is: 408,515.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,840.80 : 969,915.60 = 272,440.80 : x
  2. Step 2: Convert to fraction form
    646,840.80/969,915.60 = 272,440.80/x
  3. Step 3: Cross multiply
    646,840.80x = 969,915.60 × 272,440.80
  4. Step 4: Simplify right side
    646,840.80x = 264,244,581,996.48
  5. Step 5: Solve for x
    x = 264,244,581,996.48/646,840.80
  6. Step 6: Final answer
    x = 408,515.64

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1.5x scale

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.