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Finding the Fourth Proportional to 313,628.80, 470,443.20 and 103,239.40

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Solution

The fourth proportional to 313,628.80, 470,443.20 and 103,239.40 is: 154,859.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,628.80 : 470,443.20 = 103,239.40 : x
  2. Step 2: Convert to fraction form
    313,628.80/470,443.20 = 103,239.40/x
  3. Step 3: Cross multiply
    313,628.80x = 470,443.20 × 103,239.40
  4. Step 4: Simplify right side
    313,628.80x = 48,568,273,702.08
  5. Step 5: Solve for x
    x = 48,568,273,702.08/313,628.80
  6. Step 6: Final answer
    x = 154,859.10

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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.