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Finding the Fourth Proportional to 408,903.40, 613,719.60 and 240,212.80

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Solution

The fourth proportional to 408,903.40, 613,719.60 and 240,212.80 is: 360,533.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,903.40 : 613,719.60 = 240,212.80 : x
  2. Step 2: Convert to fraction form
    408,903.40/613,719.60 = 240,212.80/x
  3. Step 3: Cross multiply
    408,903.40x = 613,719.60 × 240,212.80
  4. Step 4: Simplify right side
    408,903.40x = 147,423,303,530.88
  5. Step 5: Solve for x
    x = 147,423,303,530.88/408,903.40
  6. Step 6: Final answer
    x = 360,533.33

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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.