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Finding the Fourth Proportional to 256,486.22, 386,480.04 and 210,763.34

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Solution

The fourth proportional to 256,486.22, 386,480.04 and 210,763.34 is: 317,583.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,486.22 : 386,480.04 = 210,763.34 : x
  2. Step 2: Convert to fraction form
    256,486.22/386,480.04 = 210,763.34/x
  3. Step 3: Cross multiply
    256,486.22x = 386,480.04 × 210,763.34
  4. Step 4: Simplify right side
    256,486.22x = 81,455,824,073.73
  5. Step 5: Solve for x
    x = 81,455,824,073.73/256,486.22
  6. Step 6: Final answer
    x = 317,583.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.