Home / 420,727.41-630,623.63-320,557.34

Finding the Fourth Proportional to 420,727.41, 630,623.63 and 320,557.34

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Solution

The fourth proportional to 420,727.41, 630,623.63 and 320,557.34 is: 480,479.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,727.41 : 630,623.63 = 320,557.34 : x
  2. Step 2: Convert to fraction form
    420,727.41/630,623.63 = 320,557.34/x
  3. Step 3: Cross multiply
    420,727.41x = 630,623.63 × 320,557.34
  4. Step 4: Simplify right side
    420,727.41x = 202,151,035,751.90
  5. Step 5: Solve for x
    x = 202,151,035,751.90/420,727.41
  6. Step 6: Final answer
    x = 480,479.83

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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.