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Finding the Fourth Proportional to 257,259.88, 354,905.55 and 155,228.43

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Solution

The fourth proportional to 257,259.88, 354,905.55 and 155,228.43 is: 214,147.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,259.88 : 354,905.55 = 155,228.43 : x
  2. Step 2: Convert to fraction form
    257,259.88/354,905.55 = 155,228.43/x
  3. Step 3: Cross multiply
    257,259.88x = 354,905.55 × 155,228.43
  4. Step 4: Simplify right side
    257,259.88x = 55,091,432,655.68
  5. Step 5: Solve for x
    x = 55,091,432,655.68/257,259.88
  6. Step 6: Final answer
    x = 214,147.00

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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.