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Finding the Fourth Proportional to 353,090.40, 529,635.60 and 318,098.40

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Solution

The fourth proportional to 353,090.40, 529,635.60 and 318,098.40 is: 477,147.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,090.40 : 529,635.60 = 318,098.40 : x
  2. Step 2: Convert to fraction form
    353,090.40/529,635.60 = 318,098.40/x
  3. Step 3: Cross multiply
    353,090.40x = 529,635.60 × 318,098.40
  4. Step 4: Simplify right side
    353,090.40x = 168,476,236,943.04
  5. Step 5: Solve for x
    x = 168,476,236,943.04/353,090.40
  6. Step 6: Final answer
    x = 477,147.60

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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.