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Finding the Fourth Proportional to 318,858.50, 440,055.78 and 238,145.88

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Solution

The fourth proportional to 318,858.50, 440,055.78 and 238,145.88 is: 328,664.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,858.50 : 440,055.78 = 238,145.88 : x
  2. Step 2: Convert to fraction form
    318,858.50/440,055.78 = 238,145.88/x
  3. Step 3: Cross multiply
    318,858.50x = 440,055.78 × 238,145.88
  4. Step 4: Simplify right side
    318,858.50x = 104,797,470,977.19
  5. Step 5: Solve for x
    x = 104,797,470,977.19/318,858.50
  6. Step 6: Final answer
    x = 328,664.50

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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.