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Finding the Fourth Proportional to 911,276.80, 1,366,915.20 and 828,608.20

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Solution

The fourth proportional to 911,276.80, 1,366,915.20 and 828,608.20 is: 1,242,912.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,276.80 : 1,366,915.20 = 828,608.20 : x
  2. Step 2: Convert to fraction form
    911,276.80/1,366,915.20 = 828,608.20/x
  3. Step 3: Cross multiply
    911,276.80x = 1,366,915.20 × 828,608.20
  4. Step 4: Simplify right side
    911,276.80x = 1,132,637,143,424.64
  5. Step 5: Solve for x
    x = 1,132,637,143,424.64/911,276.80
  6. Step 6: Final answer
    x = 1,242,912.30

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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.