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Finding the Fourth Proportional to 311,907.78, 430,433.78 and 168,668.86

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Solution

The fourth proportional to 311,907.78, 430,433.78 and 168,668.86 is: 232,763.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,907.78 : 430,433.78 = 168,668.86 : x
  2. Step 2: Convert to fraction form
    311,907.78/430,433.78 = 168,668.86/x
  3. Step 3: Cross multiply
    311,907.78x = 430,433.78 × 168,668.86
  4. Step 4: Simplify right side
    311,907.78x = 72,600,774,978.09
  5. Step 5: Solve for x
    x = 72,600,774,978.09/311,907.78
  6. Step 6: Final answer
    x = 232,763.59

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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.