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Finding the Fourth Proportional to 228,674.72, 315,467.58 and 138,001.70

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Solution

The fourth proportional to 228,674.72, 315,467.58 and 138,001.70 is: 190,379.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,674.72 : 315,467.58 = 138,001.70 : x
  2. Step 2: Convert to fraction form
    228,674.72/315,467.58 = 138,001.70/x
  3. Step 3: Cross multiply
    228,674.72x = 315,467.58 × 138,001.70
  4. Step 4: Simplify right side
    228,674.72x = 43,535,062,334.89
  5. Step 5: Solve for x
    x = 43,535,062,334.89/228,674.72
  6. Step 6: Final answer
    x = 190,379.87

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1.5x scale

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.