Home / 280,784.24-421,022.12-138,316.04

Finding the Fourth Proportional to 280,784.24, 421,022.12 and 138,316.04

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Solution

The fourth proportional to 280,784.24, 421,022.12 and 138,316.04 is: 207,398.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,784.24 : 421,022.12 = 138,316.04 : x
  2. Step 2: Convert to fraction form
    280,784.24/421,022.12 = 138,316.04/x
  3. Step 3: Cross multiply
    280,784.24x = 421,022.12 × 138,316.04
  4. Step 4: Simplify right side
    280,784.24x = 58,234,112,390.80
  5. Step 5: Solve for x
    x = 58,234,112,390.80/280,784.24
  6. Step 6: Final answer
    x = 207,398.08

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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.