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Finding the Fourth Proportional to 315,903.68, 435,958.80 and 172,673.36

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Solution

The fourth proportional to 315,903.68, 435,958.80 and 172,673.36 is: 238,295.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,903.68 : 435,958.80 = 172,673.36 : x
  2. Step 2: Convert to fraction form
    315,903.68/435,958.80 = 172,673.36/x
  3. Step 3: Cross multiply
    315,903.68x = 435,958.80 × 172,673.36
  4. Step 4: Simplify right side
    315,903.68x = 75,278,470,817.57
  5. Step 5: Solve for x
    x = 75,278,470,817.57/315,903.68
  6. Step 6: Final answer
    x = 238,295.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.