Home / 420,499.30-630,103.09-285,387.80

Finding the Fourth Proportional to 420,499.30, 630,103.09 and 285,387.80

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Solution

The fourth proportional to 420,499.30, 630,103.09 and 285,387.80 is: 427,643.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,499.30 : 630,103.09 = 285,387.80 : x
  2. Step 2: Convert to fraction form
    420,499.30/630,103.09 = 285,387.80/x
  3. Step 3: Cross multiply
    420,499.30x = 630,103.09 × 285,387.80
  4. Step 4: Simplify right side
    420,499.30x = 179,823,734,628.30
  5. Step 5: Solve for x
    x = 179,823,734,628.30/420,499.30
  6. Step 6: Final answer
    x = 427,643.36

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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.