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Finding the Fourth Proportional to 228,996.90, 316,018.98 and 138,340.26

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Solution

The fourth proportional to 228,996.90, 316,018.98 and 138,340.26 is: 190,911.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,996.90 : 316,018.98 = 138,340.26 : x
  2. Step 2: Convert to fraction form
    228,996.90/316,018.98 = 138,340.26/x
  3. Step 3: Cross multiply
    228,996.90x = 316,018.98 × 138,340.26
  4. Step 4: Simplify right side
    228,996.90x = 43,718,147,858.13
  5. Step 5: Solve for x
    x = 43,718,147,858.13/228,996.90
  6. Step 6: Final answer
    x = 190,911.53

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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.