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Finding the Fourth Proportional to 539,339.88, 809,003.34 and 139,945.08

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Solution

The fourth proportional to 539,339.88, 809,003.34 and 139,945.08 is: 209,915.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,339.88 : 809,003.34 = 139,945.08 : x
  2. Step 2: Convert to fraction form
    539,339.88/809,003.34 = 139,945.08/x
  3. Step 3: Cross multiply
    539,339.88x = 809,003.34 × 139,945.08
  4. Step 4: Simplify right side
    539,339.88x = 113,216,037,136.57
  5. Step 5: Solve for x
    x = 113,216,037,136.57/539,339.88
  6. Step 6: Final answer
    x = 209,915.94

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1.5x scale

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.