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Finding the Fourth Proportional to 307,720.40, 461,645.40 and 97,379.60

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Solution

The fourth proportional to 307,720.40, 461,645.40 and 97,379.60 is: 146,089.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,720.40 : 461,645.40 = 97,379.60 : x
  2. Step 2: Convert to fraction form
    307,720.40/461,645.40 = 97,379.60/x
  3. Step 3: Cross multiply
    307,720.40x = 461,645.40 × 97,379.60
  4. Step 4: Simplify right side
    307,720.40x = 44,954,844,393.84
  5. Step 5: Solve for x
    x = 44,954,844,393.84/307,720.40
  6. Step 6: Final answer
    x = 146,089.91

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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.