Home / 420,731.41-630,629.62-320,561.35

Finding the Fourth Proportional to 420,731.41, 630,629.62 and 320,561.35

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Solution

The fourth proportional to 420,731.41, 630,629.62 and 320,561.35 is: 480,485.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,731.41 : 630,629.62 = 320,561.35 : x
  2. Step 2: Convert to fraction form
    420,731.41/630,629.62 = 320,561.35/x
  3. Step 3: Cross multiply
    420,731.41x = 630,629.62 × 320,561.35
  4. Step 4: Simplify right side
    420,731.41x = 202,155,482,337.19
  5. Step 5: Solve for x
    x = 202,155,482,337.19/420,731.41
  6. Step 6: Final answer
    x = 480,485.83

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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.