Home / 305,328.50-421,403.76-169,406.18

Finding the Fourth Proportional to 305,328.50, 421,403.76 and 169,406.18

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Solution

The fourth proportional to 305,328.50, 421,403.76 and 169,406.18 is: 233,808.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,328.50 : 421,403.76 = 169,406.18 : x
  2. Step 2: Convert to fraction form
    305,328.50/421,403.76 = 169,406.18/x
  3. Step 3: Cross multiply
    305,328.50x = 421,403.76 × 169,406.18
  4. Step 4: Simplify right side
    305,328.50x = 71,388,399,112.22
  5. Step 5: Solve for x
    x = 71,388,399,112.22/305,328.50
  6. Step 6: Final answer
    x = 233,808.51

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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.