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Finding the Fourth Proportional to 405,188.60, 606,908.10 and 352,700.60

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Solution

The fourth proportional to 405,188.60, 606,908.10 and 352,700.60 is: 528,289.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,188.60 : 606,908.10 = 352,700.60 : x
  2. Step 2: Convert to fraction form
    405,188.60/606,908.10 = 352,700.60/x
  3. Step 3: Cross multiply
    405,188.60x = 606,908.10 × 352,700.60
  4. Step 4: Simplify right side
    405,188.60x = 214,056,851,014.86
  5. Step 5: Solve for x
    x = 214,056,851,014.86/405,188.60
  6. Step 6: Final answer
    x = 528,289.42

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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.