Home / 280,738.94-387,438.16-158,261.54

Finding the Fourth Proportional to 280,738.94, 387,438.16 and 158,261.54

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Solution

The fourth proportional to 280,738.94, 387,438.16 and 158,261.54 is: 218,411.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,738.94 : 387,438.16 = 158,261.54 : x
  2. Step 2: Convert to fraction form
    280,738.94/387,438.16 = 158,261.54/x
  3. Step 3: Cross multiply
    280,738.94x = 387,438.16 × 158,261.54
  4. Step 4: Simplify right side
    280,738.94x = 61,316,559,856.37
  5. Step 5: Solve for x
    x = 61,316,559,856.37/280,738.94
  6. Step 6: Final answer
    x = 218,411.31

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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.