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Finding the Fourth Proportional to 639,777.60, 959,205.60 and 359,380.80

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Solution

The fourth proportional to 639,777.60, 959,205.60 and 359,380.80 is: 538,812.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,777.60 : 959,205.60 = 359,380.80 : x
  2. Step 2: Convert to fraction form
    639,777.60/959,205.60 = 359,380.80/x
  3. Step 3: Cross multiply
    639,777.60x = 959,205.60 × 359,380.80
  4. Step 4: Simplify right side
    639,777.60x = 344,720,075,892.48
  5. Step 5: Solve for x
    x = 344,720,075,892.48/639,777.60
  6. Step 6: Final answer
    x = 538,812.36

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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.