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Finding the Fourth Proportional to 405,090.60, 606,761.10 and 352,602.60

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Solution

The fourth proportional to 405,090.60, 606,761.10 and 352,602.60 is: 528,142.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,090.60 : 606,761.10 = 352,602.60 : x
  2. Step 2: Convert to fraction form
    405,090.60/606,761.10 = 352,602.60/x
  3. Step 3: Cross multiply
    405,090.60x = 606,761.10 × 352,602.60
  4. Step 4: Simplify right side
    405,090.60x = 213,945,541,438.86
  5. Step 5: Solve for x
    x = 213,945,541,438.86/405,090.60
  6. Step 6: Final answer
    x = 528,142.45

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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.