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Finding the Fourth Proportional to 655,543.20, 983,314.80 and 520,240.80

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Solution

The fourth proportional to 655,543.20, 983,314.80 and 520,240.80 is: 780,361.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,543.20 : 983,314.80 = 520,240.80 : x
  2. Step 2: Convert to fraction form
    655,543.20/983,314.80 = 520,240.80/x
  3. Step 3: Cross multiply
    655,543.20x = 983,314.80 × 520,240.80
  4. Step 4: Simplify right side
    655,543.20x = 511,560,478,203.84
  5. Step 5: Solve for x
    x = 511,560,478,203.84/655,543.20
  6. Step 6: Final answer
    x = 780,361.20

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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.