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Finding the Fourth Proportional to 256,776.58, 384,956.20 and 107,128.37

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Solution

The fourth proportional to 256,776.58, 384,956.20 and 107,128.37 is: 160,605.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,776.58 : 384,956.20 = 107,128.37 : x
  2. Step 2: Convert to fraction form
    256,776.58/384,956.20 = 107,128.37/x
  3. Step 3: Cross multiply
    256,776.58x = 384,956.20 × 107,128.37
  4. Step 4: Simplify right side
    256,776.58x = 41,239,730,721.10
  5. Step 5: Solve for x
    x = 41,239,730,721.10/256,776.58
  6. Step 6: Final answer
    x = 160,605.50

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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.