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Finding the Fourth Proportional to 254,703.40, 381,617.70 and 165,911.20

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Solution

The fourth proportional to 254,703.40, 381,617.70 and 165,911.20 is: 248,581.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,703.40 : 381,617.70 = 165,911.20 : x
  2. Step 2: Convert to fraction form
    254,703.40/381,617.70 = 165,911.20/x
  3. Step 3: Cross multiply
    254,703.40x = 381,617.70 × 165,911.20
  4. Step 4: Simplify right side
    254,703.40x = 63,314,650,548.24
  5. Step 5: Solve for x
    x = 63,314,650,548.24/254,703.40
  6. Step 6: Final answer
    x = 248,581.88

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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.