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Finding the Fourth Proportional to 309,883.84, 427,634.08 and 173,907.12

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Solution

The fourth proportional to 309,883.84, 427,634.08 and 173,907.12 is: 239,988.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,883.84 : 427,634.08 = 173,907.12 : x
  2. Step 2: Convert to fraction form
    309,883.84/427,634.08 = 173,907.12/x
  3. Step 3: Cross multiply
    309,883.84x = 427,634.08 × 173,907.12
  4. Step 4: Simplify right side
    309,883.84x = 74,368,611,266.65
  5. Step 5: Solve for x
    x = 74,368,611,266.65/309,883.84
  6. Step 6: Final answer
    x = 239,988.67

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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.