Home / 280,305.42-420,443.06-138,008.84

Finding the Fourth Proportional to 280,305.42, 420,443.06 and 138,008.84

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Solution

The fourth proportional to 280,305.42, 420,443.06 and 138,008.84 is: 207,005.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,305.42 : 420,443.06 = 138,008.84 : x
  2. Step 2: Convert to fraction form
    280,305.42/420,443.06 = 138,008.84/x
  3. Step 3: Cross multiply
    280,305.42x = 420,443.06 × 138,008.84
  4. Step 4: Simplify right side
    280,305.42x = 58,024,859,875.25
  5. Step 5: Solve for x
    x = 58,024,859,875.25/280,305.42
  6. Step 6: Final answer
    x = 207,005.84

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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.