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Finding the Fourth Proportional to 258,886.47, 388,352.16 and 79,012.44

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Solution

The fourth proportional to 258,886.47, 388,352.16 and 79,012.44 is: 118,525.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,886.47 : 388,352.16 = 79,012.44 : x
  2. Step 2: Convert to fraction form
    258,886.47/388,352.16 = 79,012.44/x
  3. Step 3: Cross multiply
    258,886.47x = 388,352.16 × 79,012.44
  4. Step 4: Simplify right side
    258,886.47x = 30,684,651,740.87
  5. Step 5: Solve for x
    x = 30,684,651,740.87/258,886.47
  6. Step 6: Final answer
    x = 118,525.51

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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.