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Finding the Fourth Proportional to 267,239.20, 368,821.20 and 154,066

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Solution

The fourth proportional to 267,239.20, 368,821.20 and 154,066 is: 212,629.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    267,239.20 : 368,821.20 = 154,066 : x
  2. Step 2: Convert to fraction form
    267,239.20/368,821.20 = 154,066/x
  3. Step 3: Cross multiply
    267,239.20x = 368,821.20 × 154,066
  4. Step 4: Simplify right side
    267,239.20x = 56,822,806,999.20
  5. Step 5: Solve for x
    x = 56,822,806,999.20/267,239.20
  6. Step 6: Final answer
    x = 212,629.01

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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.