Home / 763,200.80-1,143,879.60-389,031.20

Finding the Fourth Proportional to 763,200.80, 1,143,879.60 and 389,031.20

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Solution

The fourth proportional to 763,200.80, 1,143,879.60 and 389,031.20 is: 583,077.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,200.80 : 1,143,879.60 = 389,031.20 : x
  2. Step 2: Convert to fraction form
    763,200.80/1,143,879.60 = 389,031.20/x
  3. Step 3: Cross multiply
    763,200.80x = 1,143,879.60 × 389,031.20
  4. Step 4: Simplify right side
    763,200.80x = 445,004,853,443.52
  5. Step 5: Solve for x
    x = 445,004,853,443.52/763,200.80
  6. Step 6: Final answer
    x = 583,077.03

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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.