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Finding the Fourth Proportional to 388,887.36, 533,164.48 and 381,801.60

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Solution

The fourth proportional to 388,887.36, 533,164.48 and 381,801.60 is: 523,449.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,887.36 : 533,164.48 = 381,801.60 : x
  2. Step 2: Convert to fraction form
    388,887.36/533,164.48 = 381,801.60/x
  3. Step 3: Cross multiply
    388,887.36x = 533,164.48 × 381,801.60
  4. Step 4: Simplify right side
    388,887.36x = 203,563,051,527.17
  5. Step 5: Solve for x
    x = 203,563,051,527.17/388,887.36
  6. Step 6: Final answer
    x = 523,449.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.