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Finding the Fourth Proportional to 529,618.40, 793,390.80 and 318,629.60

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Solution

The fourth proportional to 529,618.40, 793,390.80 and 318,629.60 is: 477,320.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,618.40 : 793,390.80 = 318,629.60 : x
  2. Step 2: Convert to fraction form
    529,618.40/793,390.80 = 318,629.60/x
  3. Step 3: Cross multiply
    529,618.40x = 793,390.80 × 318,629.60
  4. Step 4: Simplify right side
    529,618.40x = 252,797,793,247.68
  5. Step 5: Solve for x
    x = 252,797,793,247.68/529,618.40
  6. Step 6: Final answer
    x = 477,320.64

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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.