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Finding the Fourth Proportional to 321,312.40, 481,968.60 and 188,342.80

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Solution

The fourth proportional to 321,312.40, 481,968.60 and 188,342.80 is: 282,514.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,312.40 : 481,968.60 = 188,342.80 : x
  2. Step 2: Convert to fraction form
    321,312.40/481,968.60 = 188,342.80/x
  3. Step 3: Cross multiply
    321,312.40x = 481,968.60 × 188,342.80
  4. Step 4: Simplify right side
    321,312.40x = 90,775,315,636.08
  5. Step 5: Solve for x
    x = 90,775,315,636.08/321,312.40
  6. Step 6: Final answer
    x = 282,514.20

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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.