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Finding the Fourth Proportional to 313,930.80, 470,723.40 and 103,460.40

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Solution

The fourth proportional to 313,930.80, 470,723.40 and 103,460.40 is: 155,133.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,930.80 : 470,723.40 = 103,460.40 : x
  2. Step 2: Convert to fraction form
    313,930.80/470,723.40 = 103,460.40/x
  3. Step 3: Cross multiply
    313,930.80x = 470,723.40 × 103,460.40
  4. Step 4: Simplify right side
    313,930.80x = 48,701,231,253.36
  5. Step 5: Solve for x
    x = 48,701,231,253.36/313,930.80
  6. Step 6: Final answer
    x = 155,133.65

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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.