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Finding the Fourth Proportional to 405,984.80, 608,919.60 and 125,530.40

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Solution

The fourth proportional to 405,984.80, 608,919.60 and 125,530.40 is: 188,277.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,984.80 : 608,919.60 = 125,530.40 : x
  2. Step 2: Convert to fraction form
    405,984.80/608,919.60 = 125,530.40/x
  3. Step 3: Cross multiply
    405,984.80x = 608,919.60 × 125,530.40
  4. Step 4: Simplify right side
    405,984.80x = 76,437,920,955.84
  5. Step 5: Solve for x
    x = 76,437,920,955.84/405,984.80
  6. Step 6: Final answer
    x = 188,277.79

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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.