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Finding the Fourth Proportional to 313,828.80, 470,743.20 and 103,439.40

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Solution

The fourth proportional to 313,828.80, 470,743.20 and 103,439.40 is: 155,159.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,828.80 : 470,743.20 = 103,439.40 : x
  2. Step 2: Convert to fraction form
    313,828.80/470,743.20 = 103,439.40/x
  3. Step 3: Cross multiply
    313,828.80x = 470,743.20 × 103,439.40
  4. Step 4: Simplify right side
    313,828.80x = 48,693,394,162.08
  5. Step 5: Solve for x
    x = 48,693,394,162.08/313,828.80
  6. Step 6: Final answer
    x = 155,159.10

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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.