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Finding the Fourth Proportional to 388,401.60, 582,699.60 and 308,740.80

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Solution

The fourth proportional to 388,401.60, 582,699.60 and 308,740.80 is: 463,188.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,401.60 : 582,699.60 = 308,740.80 : x
  2. Step 2: Convert to fraction form
    388,401.60/582,699.60 = 308,740.80/x
  3. Step 3: Cross multiply
    388,401.60x = 582,699.60 × 308,740.80
  4. Step 4: Simplify right side
    388,401.60x = 179,903,140,663.68
  5. Step 5: Solve for x
    x = 179,903,140,663.68/388,401.60
  6. Step 6: Final answer
    x = 463,188.46

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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.