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Finding the Fourth Proportional to 405,314.55, 608,005.58 and 120,986.33

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Solution

The fourth proportional to 405,314.55, 608,005.58 and 120,986.33 is: 181,489.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,314.55 : 608,005.58 = 120,986.33 : x
  2. Step 2: Convert to fraction form
    405,314.55/608,005.58 = 120,986.33/x
  3. Step 3: Cross multiply
    405,314.55x = 608,005.58 × 120,986.33
  4. Step 4: Simplify right side
    405,314.55x = 73,560,360,098.76
  5. Step 5: Solve for x
    x = 73,560,360,098.76/405,314.55
  6. Step 6: Final answer
    x = 181,489.56

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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.