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Finding the Fourth Proportional to 281,315.69, 421,973.53 and 84,323.69

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Solution

The fourth proportional to 281,315.69, 421,973.53 and 84,323.69 is: 126,485.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,315.69 : 421,973.53 = 84,323.69 : x
  2. Step 2: Convert to fraction form
    281,315.69/421,973.53 = 84,323.69/x
  3. Step 3: Cross multiply
    281,315.69x = 421,973.53 × 84,323.69
  4. Step 4: Simplify right side
    281,315.69x = 35,582,365,131.93
  5. Step 5: Solve for x
    x = 35,582,365,131.93/281,315.69
  6. Step 6: Final answer
    x = 126,485.53

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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.