Home / 281,921.79-388,675.66-223,970.78

Finding the Fourth Proportional to 281,921.79, 388,675.66 and 223,970.78

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Solution

The fourth proportional to 281,921.79, 388,675.66 and 223,970.78 is: 308,780.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,921.79 : 388,675.66 = 223,970.78 : x
  2. Step 2: Convert to fraction form
    281,921.79/388,675.66 = 223,970.78/x
  3. Step 3: Cross multiply
    281,921.79x = 388,675.66 × 223,970.78
  4. Step 4: Simplify right side
    281,921.79x = 87,051,990,737.21
  5. Step 5: Solve for x
    x = 87,051,990,737.21/281,921.79
  6. Step 6: Final answer
    x = 308,780.64

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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.