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Finding the Fourth Proportional to 351,789.12, 486,111.84 and 256,128.96

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Solution

The fourth proportional to 351,789.12, 486,111.84 and 256,128.96 is: 353,926.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,789.12 : 486,111.84 = 256,128.96 : x
  2. Step 2: Convert to fraction form
    351,789.12/486,111.84 = 256,128.96/x
  3. Step 3: Cross multiply
    351,789.12x = 486,111.84 × 256,128.96
  4. Step 4: Simplify right side
    351,789.12x = 124,507,320,022.89
  5. Step 5: Solve for x
    x = 124,507,320,022.89/351,789.12
  6. Step 6: Final answer
    x = 353,926.01

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1.5x scale

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.