Home / 746,578.80-1,120,012.20-320,108.40

Finding the Fourth Proportional to 746,578.80, 1,120,012.20 and 320,108.40

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Solution

The fourth proportional to 746,578.80, 1,120,012.20 and 320,108.40 is: 480,224.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    746,578.80 : 1,120,012.20 = 320,108.40 : x
  2. Step 2: Convert to fraction form
    746,578.80/1,120,012.20 = 320,108.40/x
  3. Step 3: Cross multiply
    746,578.80x = 1,120,012.20 × 320,108.40
  4. Step 4: Simplify right side
    746,578.80x = 358,525,313,322.48
  5. Step 5: Solve for x
    x = 358,525,313,322.48/746,578.80
  6. Step 6: Final answer
    x = 480,224.34

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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.