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Finding the Fourth Proportional to 388,242.50, 582,503.87 and 135,560.21

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Solution

The fourth proportional to 388,242.50, 582,503.87 and 135,560.21 is: 203,389.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,242.50 : 582,503.87 = 135,560.21 : x
  2. Step 2: Convert to fraction form
    388,242.50/582,503.87 = 135,560.21/x
  3. Step 3: Cross multiply
    388,242.50x = 582,503.87 × 135,560.21
  4. Step 4: Simplify right side
    388,242.50x = 78,964,346,943.01
  5. Step 5: Solve for x
    x = 78,964,346,943.01/388,242.50
  6. Step 6: Final answer
    x = 203,389.24

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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.