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Finding the Fourth Proportional to 255,048.69, 351,969.89 and 140,328.84

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Solution

The fourth proportional to 255,048.69, 351,969.89 and 140,328.84 is: 193,655.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,048.69 : 351,969.89 = 140,328.84 : x
  2. Step 2: Convert to fraction form
    255,048.69/351,969.89 = 140,328.84/x
  3. Step 3: Cross multiply
    255,048.69x = 351,969.89 × 140,328.84
  4. Step 4: Simplify right side
    255,048.69x = 49,391,525,676.98
  5. Step 5: Solve for x
    x = 49,391,525,676.98/255,048.69
  6. Step 6: Final answer
    x = 193,655.28

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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.