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Finding the Fourth Proportional to 443,835.42, 665,851.54 and 128,268.33

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Solution

The fourth proportional to 443,835.42, 665,851.54 and 128,268.33 is: 192,430.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,835.42 : 665,851.54 = 128,268.33 : x
  2. Step 2: Convert to fraction form
    443,835.42/665,851.54 = 128,268.33/x
  3. Step 3: Cross multiply
    443,835.42x = 665,851.54 × 128,268.33
  4. Step 4: Simplify right side
    443,835.42x = 85,407,662,486.62
  5. Step 5: Solve for x
    x = 85,407,662,486.62/443,835.42
  6. Step 6: Final answer
    x = 192,430.93

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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.