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Finding the Fourth Proportional to 313,809, 470,920.86 and 147,609.96

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Solution

The fourth proportional to 313,809, 470,920.86 and 147,609.96 is: 221,512.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,809 : 470,920.86 = 147,609.96 : x
  2. Step 2: Convert to fraction form
    313,809/470,920.86 = 147,609.96/x
  3. Step 3: Cross multiply
    313,809x = 470,920.86 × 147,609.96
  4. Step 4: Simplify right side
    313,809x = 69,512,609,307.77
  5. Step 5: Solve for x
    x = 69,512,609,307.77/313,809
  6. Step 6: Final answer
    x = 221,512.48

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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.