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Finding the Fourth Proportional to 256,239.70, 384,359.55 and 252,303.10

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Solution

The fourth proportional to 256,239.70, 384,359.55 and 252,303.10 is: 378,454.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,239.70 : 384,359.55 = 252,303.10 : x
  2. Step 2: Convert to fraction form
    256,239.70/384,359.55 = 252,303.10/x
  3. Step 3: Cross multiply
    256,239.70x = 384,359.55 × 252,303.10
  4. Step 4: Simplify right side
    256,239.70x = 96,975,105,979.61
  5. Step 5: Solve for x
    x = 96,975,105,979.61/256,239.70
  6. Step 6: Final answer
    x = 378,454.65

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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.