Home / 728,105.24-1,004,789.90-405,835.80

Finding the Fourth Proportional to 728,105.24, 1,004,789.90 and 405,835.80

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Solution

The fourth proportional to 728,105.24, 1,004,789.90 and 405,835.80 is: 560,056.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,105.24 : 1,004,789.90 = 405,835.80 : x
  2. Step 2: Convert to fraction form
    728,105.24/1,004,789.90 = 405,835.80/x
  3. Step 3: Cross multiply
    728,105.24x = 1,004,789.90 × 405,835.80
  4. Step 4: Simplify right side
    728,105.24x = 407,779,712,898.42
  5. Step 5: Solve for x
    x = 407,779,712,898.42/728,105.24
  6. Step 6: Final answer
    x = 560,056.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.