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Finding the Fourth Proportional to 256,779.32, 385,093.72 and 96,739.78

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Solution

The fourth proportional to 256,779.32, 385,093.72 and 96,739.78 is: 145,081.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,779.32 : 385,093.72 = 96,739.78 : x
  2. Step 2: Convert to fraction form
    256,779.32/385,093.72 = 96,739.78/x
  3. Step 3: Cross multiply
    256,779.32x = 385,093.72 × 96,739.78
  4. Step 4: Simplify right side
    256,779.32x = 37,253,881,752.18
  5. Step 5: Solve for x
    x = 37,253,881,752.18/256,779.32
  6. Step 6: Final answer
    x = 145,081.32

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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.