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Finding the Fourth Proportional to 725,704.40, 1,087,244.40 and 620,728.40

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Solution

The fourth proportional to 725,704.40, 1,087,244.40 and 620,728.40 is: 929,970.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    725,704.40 : 1,087,244.40 = 620,728.40 : x
  2. Step 2: Convert to fraction form
    725,704.40/1,087,244.40 = 620,728.40/x
  3. Step 3: Cross multiply
    725,704.40x = 1,087,244.40 × 620,728.40
  4. Step 4: Simplify right side
    725,704.40x = 674,883,476,820.96
  5. Step 5: Solve for x
    x = 674,883,476,820.96/725,704.40
  6. Step 6: Final answer
    x = 929,970.21

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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.