Home / 280,450.75-387,021.81-153,126.34

Finding the Fourth Proportional to 280,450.75, 387,021.81 and 153,126.34

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Solution

The fourth proportional to 280,450.75, 387,021.81 and 153,126.34 is: 211,314.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,450.75 : 387,021.81 = 153,126.34 : x
  2. Step 2: Convert to fraction form
    280,450.75/387,021.81 = 153,126.34/x
  3. Step 3: Cross multiply
    280,450.75x = 387,021.81 × 153,126.34
  4. Step 4: Simplify right side
    280,450.75x = 59,263,231,330.37
  5. Step 5: Solve for x
    x = 59,263,231,330.37/280,450.75
  6. Step 6: Final answer
    x = 211,314.22

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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.