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Finding the Fourth Proportional to 305,242.50, 421,235.85 and 169,289.07

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Solution

The fourth proportional to 305,242.50, 421,235.85 and 169,289.07 is: 233,619.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,242.50 : 421,235.85 = 169,289.07 : x
  2. Step 2: Convert to fraction form
    305,242.50/421,235.85 = 169,289.07/x
  3. Step 3: Cross multiply
    305,242.50x = 421,235.85 × 169,289.07
  4. Step 4: Simplify right side
    305,242.50x = 71,310,625,297.16
  5. Step 5: Solve for x
    x = 71,310,625,297.16/305,242.50
  6. Step 6: Final answer
    x = 233,619.58

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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.