Home / 420,733.44-630,632.64-320,563.32

Finding the Fourth Proportional to 420,733.44, 630,632.64 and 320,563.32

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Solution

The fourth proportional to 420,733.44, 630,632.64 and 320,563.32 is: 480,488.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,733.44 : 630,632.64 = 320,563.32 : x
  2. Step 2: Convert to fraction form
    420,733.44/630,632.64 = 320,563.32/x
  3. Step 3: Cross multiply
    420,733.44x = 630,632.64 × 320,563.32
  4. Step 4: Simplify right side
    420,733.44x = 202,157,692,778.77
  5. Step 5: Solve for x
    x = 202,157,692,778.77/420,733.44
  6. Step 6: Final answer
    x = 480,488.77

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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.