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Finding the Fourth Proportional to 318,940.56, 440,585.64 and 302,144.40

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Solution

The fourth proportional to 318,940.56, 440,585.64 and 302,144.40 is: 417,383.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,940.56 : 440,585.64 = 302,144.40 : x
  2. Step 2: Convert to fraction form
    318,940.56/440,585.64 = 302,144.40/x
  3. Step 3: Cross multiply
    318,940.56x = 440,585.64 × 302,144.40
  4. Step 4: Simplify right side
    318,940.56x = 133,120,483,846.42
  5. Step 5: Solve for x
    x = 133,120,483,846.42/318,940.56
  6. Step 6: Final answer
    x = 417,383.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.