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Finding the Fourth Proportional to 318,808.78, 439,956.21 and 175,568.38

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Solution

The fourth proportional to 318,808.78, 439,956.21 and 175,568.38 is: 242,284.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,808.78 : 439,956.21 = 175,568.38 : x
  2. Step 2: Convert to fraction form
    318,808.78/439,956.21 = 175,568.38/x
  3. Step 3: Cross multiply
    318,808.78x = 439,956.21 × 175,568.38
  4. Step 4: Simplify right side
    318,808.78x = 77,242,399,060.64
  5. Step 5: Solve for x
    x = 77,242,399,060.64/318,808.78
  6. Step 6: Final answer
    x = 242,284.42

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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.