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Finding the Fourth Proportional to 318,335.40, 477,723.90 and 239,615.40

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Solution

The fourth proportional to 318,335.40, 477,723.90 and 239,615.40 is: 359,589.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,335.40 : 477,723.90 = 239,615.40 : x
  2. Step 2: Convert to fraction form
    318,335.40/477,723.90 = 239,615.40/x
  3. Step 3: Cross multiply
    318,335.40x = 477,723.90 × 239,615.40
  4. Step 4: Simplify right side
    318,335.40x = 114,470,003,388.06
  5. Step 5: Solve for x
    x = 114,470,003,388.06/318,335.40
  6. Step 6: Final answer
    x = 359,589.30

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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.