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Finding the Fourth Proportional to 1,768,832.80, 2,652,730.80 and 821,975.20

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Solution

The fourth proportional to 1,768,832.80, 2,652,730.80 and 821,975.20 is: 1,232,721.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,768,832.80 : 2,652,730.80 = 821,975.20 : x
  2. Step 2: Convert to fraction form
    1,768,832.80/2,652,730.80 = 821,975.20/x
  3. Step 3: Cross multiply
    1,768,832.80x = 2,652,730.80 × 821,975.20
  4. Step 4: Simplify right side
    1,768,832.80x = 2,180,478,929,876.16
  5. Step 5: Solve for x
    x = 2,180,478,929,876.16/1,768,832.80
  6. Step 6: Final answer
    x = 1,232,721.90

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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.