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Finding the Fourth Proportional to 257,422.40, 386,133.60 and 248,820.80

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Solution

The fourth proportional to 257,422.40, 386,133.60 and 248,820.80 is: 373,231.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,422.40 : 386,133.60 = 248,820.80 : x
  2. Step 2: Convert to fraction form
    257,422.40/386,133.60 = 248,820.80/x
  3. Step 3: Cross multiply
    257,422.40x = 386,133.60 × 248,820.80
  4. Step 4: Simplify right side
    257,422.40x = 96,078,071,258.88
  5. Step 5: Solve for x
    x = 96,078,071,258.88/257,422.40
  6. Step 6: Final answer
    x = 373,231.20

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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.