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Finding the Fourth Proportional to 320,415.75, 480,728.93 and 131,035.47

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Solution

The fourth proportional to 320,415.75, 480,728.93 and 131,035.47 is: 196,596.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,415.75 : 480,728.93 = 131,035.47 : x
  2. Step 2: Convert to fraction form
    320,415.75/480,728.93 = 131,035.47/x
  3. Step 3: Cross multiply
    320,415.75x = 480,728.93 × 131,035.47
  4. Step 4: Simplify right side
    320,415.75x = 62,992,541,531.34
  5. Step 5: Solve for x
    x = 62,992,541,531.34/320,415.75
  6. Step 6: Final answer
    x = 196,596.27

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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.