Home / 685,570.40-1,028,647.20-330,401.60

Finding the Fourth Proportional to 685,570.40, 1,028,647.20 and 330,401.60

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Solution

The fourth proportional to 685,570.40, 1,028,647.20 and 330,401.60 is: 495,742.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,570.40 : 1,028,647.20 = 330,401.60 : x
  2. Step 2: Convert to fraction form
    685,570.40/1,028,647.20 = 330,401.60/x
  3. Step 3: Cross multiply
    685,570.40x = 1,028,647.20 × 330,401.60
  4. Step 4: Simplify right side
    685,570.40x = 339,866,680,715.52
  5. Step 5: Solve for x
    x = 339,866,680,715.52/685,570.40
  6. Step 6: Final answer
    x = 495,742.93

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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.