Home / 493,108.80-680,509.44-289,131.36

Finding the Fourth Proportional to 493,108.80, 680,509.44 and 289,131.36

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Solution

The fourth proportional to 493,108.80, 680,509.44 and 289,131.36 is: 399,012.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,108.80 : 680,509.44 = 289,131.36 : x
  2. Step 2: Convert to fraction form
    493,108.80/680,509.44 = 289,131.36/x
  3. Step 3: Cross multiply
    493,108.80x = 680,509.44 × 289,131.36
  4. Step 4: Simplify right side
    493,108.80x = 196,756,619,880.04
  5. Step 5: Solve for x
    x = 196,756,619,880.04/493,108.80
  6. Step 6: Final answer
    x = 399,012.59

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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.