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Finding the Fourth Proportional to 313,840.40, 470,760.60 and 103,427.60

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Solution

The fourth proportional to 313,840.40, 470,760.60 and 103,427.60 is: 155,141.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,840.40 : 470,760.60 = 103,427.60 : x
  2. Step 2: Convert to fraction form
    313,840.40/470,760.60 = 103,427.60/x
  3. Step 3: Cross multiply
    313,840.40x = 470,760.60 × 103,427.60
  4. Step 4: Simplify right side
    313,840.40x = 48,689,639,032.56
  5. Step 5: Solve for x
    x = 48,689,639,032.56/313,840.40
  6. Step 6: Final answer
    x = 155,141.40

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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.