Home / 280,370.36-420,561.45-100,467.51

Finding the Fourth Proportional to 280,370.36, 420,561.45 and 100,467.51

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Solution

The fourth proportional to 280,370.36, 420,561.45 and 100,467.51 is: 150,703.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,370.36 : 420,561.45 = 100,467.51 : x
  2. Step 2: Convert to fraction form
    280,370.36/420,561.45 = 100,467.51/x
  3. Step 3: Cross multiply
    280,370.36x = 420,561.45 × 100,467.51
  4. Step 4: Simplify right side
    280,370.36x = 42,252,761,683.49
  5. Step 5: Solve for x
    x = 42,252,761,683.49/280,370.36
  6. Step 6: Final answer
    x = 150,703.39

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1.5x scale

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.