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Finding the Fourth Proportional to 318,857.75, 440,054.74 and 238,145.13

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Solution

The fourth proportional to 318,857.75, 440,054.74 and 238,145.13 is: 328,663.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,857.75 : 440,054.74 = 238,145.13 : x
  2. Step 2: Convert to fraction form
    318,857.75/440,054.74 = 238,145.13/x
  3. Step 3: Cross multiply
    318,857.75x = 440,054.74 × 238,145.13
  4. Step 4: Simplify right side
    318,857.75x = 104,796,893,562.10
  5. Step 5: Solve for x
    x = 104,796,893,562.10/318,857.75
  6. Step 6: Final answer
    x = 328,663.47

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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.