Home / 812,909.02-1,121,814.30-450,356.44

Finding the Fourth Proportional to 812,909.02, 1,121,814.30 and 450,356.44

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Solution

The fourth proportional to 812,909.02, 1,121,814.30 and 450,356.44 is: 621,491.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,909.02 : 1,121,814.30 = 450,356.44 : x
  2. Step 2: Convert to fraction form
    812,909.02/1,121,814.30 = 450,356.44/x
  3. Step 3: Cross multiply
    812,909.02x = 1,121,814.30 × 450,356.44
  4. Step 4: Simplify right side
    812,909.02x = 505,216,294,489.09
  5. Step 5: Solve for x
    x = 505,216,294,489.09/812,909.02
  6. Step 6: Final answer
    x = 621,491.81

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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.