Home / 685,730.40-1,028,478.96-186,977.76

Finding the Fourth Proportional to 685,730.40, 1,028,478.96 and 186,977.76

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Solution

The fourth proportional to 685,730.40, 1,028,478.96 and 186,977.76 is: 280,434.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,730.40 : 1,028,478.96 = 186,977.76 : x
  2. Step 2: Convert to fraction form
    685,730.40/1,028,478.96 = 186,977.76/x
  3. Step 3: Cross multiply
    685,730.40x = 1,028,478.96 × 186,977.76
  4. Step 4: Simplify right side
    685,730.40x = 192,302,692,147.93
  5. Step 5: Solve for x
    x = 192,302,692,147.93/685,730.40
  6. Step 6: Final answer
    x = 280,434.84

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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.