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Finding the Fourth Proportional to 578,675.65, 798,578.79 and 320,556.55

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Solution

The fourth proportional to 578,675.65, 798,578.79 and 320,556.55 is: 442,371.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,675.65 : 798,578.79 = 320,556.55 : x
  2. Step 2: Convert to fraction form
    578,675.65/798,578.79 = 320,556.55/x
  3. Step 3: Cross multiply
    578,675.65x = 798,578.79 × 320,556.55
  4. Step 4: Simplify right side
    578,675.65x = 255,989,661,825.58
  5. Step 5: Solve for x
    x = 255,989,661,825.58/578,675.65
  6. Step 6: Final answer
    x = 442,371.58

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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.