Home / 305,388.35-421,436.27-178,088.55

Finding the Fourth Proportional to 305,388.35, 421,436.27 and 178,088.55

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Solution

The fourth proportional to 305,388.35, 421,436.27 and 178,088.55 is: 245,762.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,388.35 : 421,436.27 = 178,088.55 : x
  2. Step 2: Convert to fraction form
    305,388.35/421,436.27 = 178,088.55/x
  3. Step 3: Cross multiply
    305,388.35x = 421,436.27 × 178,088.55
  4. Step 4: Simplify right side
    305,388.35x = 75,052,973,290.09
  5. Step 5: Solve for x
    x = 75,052,973,290.09/305,388.35
  6. Step 6: Final answer
    x = 245,762.40

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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.