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Finding the Fourth Proportional to 811,608.80, 1,215,080.40 and 496,680.80

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Solution

The fourth proportional to 811,608.80, 1,215,080.40 and 496,680.80 is: 743,593.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,608.80 : 1,215,080.40 = 496,680.80 : x
  2. Step 2: Convert to fraction form
    811,608.80/1,215,080.40 = 496,680.80/x
  3. Step 3: Cross multiply
    811,608.80x = 1,215,080.40 × 496,680.80
  4. Step 4: Simplify right side
    811,608.80x = 603,507,105,136.32
  5. Step 5: Solve for x
    x = 603,507,105,136.32/811,608.80
  6. Step 6: Final answer
    x = 743,593.59

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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.