Home / 822,485.69-1,233,749.72-390,102.12

Finding the Fourth Proportional to 822,485.69, 1,233,749.72 and 390,102.12

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Solution

The fourth proportional to 822,485.69, 1,233,749.72 and 390,102.12 is: 585,163.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    822,485.69 : 1,233,749.72 = 390,102.12 : x
  2. Step 2: Convert to fraction form
    822,485.69/1,233,749.72 = 390,102.12/x
  3. Step 3: Cross multiply
    822,485.69x = 1,233,749.72 × 390,102.12
  4. Step 4: Simplify right side
    822,485.69x = 481,288,381,321.41
  5. Step 5: Solve for x
    x = 481,288,381,321.41/822,485.69
  6. Step 6: Final answer
    x = 585,163.23

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1.5x scale

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.