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Finding the Fourth Proportional to 445,930.40, 668,895.60 and 146,457.20

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Solution

The fourth proportional to 445,930.40, 668,895.60 and 146,457.20 is: 219,685.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,930.40 : 668,895.60 = 146,457.20 : x
  2. Step 2: Convert to fraction form
    445,930.40/668,895.60 = 146,457.20/x
  3. Step 3: Cross multiply
    445,930.40x = 668,895.60 × 146,457.20
  4. Step 4: Simplify right side
    445,930.40x = 97,964,576,668.32
  5. Step 5: Solve for x
    x = 97,964,576,668.32/445,930.40
  6. Step 6: Final answer
    x = 219,685.80

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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.