Home / 221,431.98-305,439.75-157,790.34

Finding the Fourth Proportional to 221,431.98, 305,439.75 and 157,790.34

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Solution

The fourth proportional to 221,431.98, 305,439.75 and 157,790.34 is: 217,653.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,431.98 : 305,439.75 = 157,790.34 : x
  2. Step 2: Convert to fraction form
    221,431.98/305,439.75 = 157,790.34/x
  3. Step 3: Cross multiply
    221,431.98x = 305,439.75 × 157,790.34
  4. Step 4: Simplify right side
    221,431.98x = 48,195,442,002.02
  5. Step 5: Solve for x
    x = 48,195,442,002.02/221,431.98
  6. Step 6: Final answer
    x = 217,653.48

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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.