Home / 280,311.24-386,708.16-171,420.35

Finding the Fourth Proportional to 280,311.24, 386,708.16 and 171,420.35

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Solution

The fourth proportional to 280,311.24, 386,708.16 and 171,420.35 is: 236,485.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,311.24 : 386,708.16 = 171,420.35 : x
  2. Step 2: Convert to fraction form
    280,311.24/386,708.16 = 171,420.35/x
  3. Step 3: Cross multiply
    280,311.24x = 386,708.16 × 171,420.35
  4. Step 4: Simplify right side
    280,311.24x = 66,289,646,201.52
  5. Step 5: Solve for x
    x = 66,289,646,201.52/280,311.24
  6. Step 6: Final answer
    x = 236,485.87

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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.