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Finding the Fourth Proportional to 355,903.20, 535,021.20 and 251,445.60

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Solution

The fourth proportional to 355,903.20, 535,021.20 and 251,445.60 is: 377,992.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,903.20 : 535,021.20 = 251,445.60 : x
  2. Step 2: Convert to fraction form
    355,903.20/535,021.20 = 251,445.60/x
  3. Step 3: Cross multiply
    355,903.20x = 535,021.20 × 251,445.60
  4. Step 4: Simplify right side
    355,903.20x = 134,528,726,646.72
  5. Step 5: Solve for x
    x = 134,528,726,646.72/355,903.20
  6. Step 6: Final answer
    x = 377,992.46

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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.