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Finding the Fourth Proportional to 445,720.60, 668,661.90 and 146,117.80

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Solution

The fourth proportional to 445,720.60, 668,661.90 and 146,117.80 is: 219,203.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,720.60 : 668,661.90 = 146,117.80 : x
  2. Step 2: Convert to fraction form
    445,720.60/668,661.90 = 146,117.80/x
  3. Step 3: Cross multiply
    445,720.60x = 668,661.90 × 146,117.80
  4. Step 4: Simplify right side
    445,720.60x = 97,703,405,771.82
  5. Step 5: Solve for x
    x = 97,703,405,771.82/445,720.60
  6. Step 6: Final answer
    x = 219,203.25

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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.