Home / 812,865.65-1,121,739.91-450,288.39

Finding the Fourth Proportional to 812,865.65, 1,121,739.91 and 450,288.39

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Solution

The fourth proportional to 812,865.65, 1,121,739.91 and 450,288.39 is: 621,389.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,865.65 : 1,121,739.91 = 450,288.39 : x
  2. Step 2: Convert to fraction form
    812,865.65/1,121,739.91 = 450,288.39/x
  3. Step 3: Cross multiply
    812,865.65x = 1,121,739.91 × 450,288.39
  4. Step 4: Simplify right side
    812,865.65x = 505,106,456,946.92
  5. Step 5: Solve for x
    x = 505,106,456,946.92/812,865.65
  6. Step 6: Final answer
    x = 621,389.84

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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.