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Finding the Fourth Proportional to 613,712.80, 919,705.20 and 487,568.80

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Solution

The fourth proportional to 613,712.80, 919,705.20 and 487,568.80 is: 730,666.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,712.80 : 919,705.20 = 487,568.80 : x
  2. Step 2: Convert to fraction form
    613,712.80/919,705.20 = 487,568.80/x
  3. Step 3: Cross multiply
    613,712.80x = 919,705.20 × 487,568.80
  4. Step 4: Simplify right side
    613,712.80x = 448,419,560,717.76
  5. Step 5: Solve for x
    x = 448,419,560,717.76/613,712.80
  6. Step 6: Final answer
    x = 730,666.79

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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.