Home / 280,558.22-386,913.92-219,312.50

Finding the Fourth Proportional to 280,558.22, 386,913.92 and 219,312.50

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Solution

The fourth proportional to 280,558.22, 386,913.92 and 219,312.50 is: 302,450.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,558.22 : 386,913.92 = 219,312.50 : x
  2. Step 2: Convert to fraction form
    280,558.22/386,913.92 = 219,312.50/x
  3. Step 3: Cross multiply
    280,558.22x = 386,913.92 × 219,312.50
  4. Step 4: Simplify right side
    280,558.22x = 84,855,059,080
  5. Step 5: Solve for x
    x = 84,855,059,080/280,558.22
  6. Step 6: Final answer
    x = 302,450.80

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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.