Home / 280,372.32-420,127.75-190,297.89

Finding the Fourth Proportional to 280,372.32, 420,127.75 and 190,297.89

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Solution

The fourth proportional to 280,372.32, 420,127.75 and 190,297.89 is: 285,154.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,372.32 : 420,127.75 = 190,297.89 : x
  2. Step 2: Convert to fraction form
    280,372.32/420,127.75 = 190,297.89/x
  3. Step 3: Cross multiply
    280,372.32x = 420,127.75 × 190,297.89
  4. Step 4: Simplify right side
    280,372.32x = 79,949,424,355.45
  5. Step 5: Solve for x
    x = 79,949,424,355.45/280,372.32
  6. Step 6: Final answer
    x = 285,154.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.