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Finding the Fourth Proportional to 254,250.75, 381,430.80 and 85,775.25

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Solution

The fourth proportional to 254,250.75, 381,430.80 and 85,775.25 is: 128,681.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,250.75 : 381,430.80 = 85,775.25 : x
  2. Step 2: Convert to fraction form
    254,250.75/381,430.80 = 85,775.25/x
  3. Step 3: Cross multiply
    254,250.75x = 381,430.80 × 85,775.25
  4. Step 4: Simplify right side
    254,250.75x = 32,717,322,227.70
  5. Step 5: Solve for x
    x = 32,717,322,227.70/254,250.75
  6. Step 6: Final answer
    x = 128,681.32

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1.5x scale

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.