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Finding the Fourth Proportional to 256,245.70, 384,368.55 and 243,123.70

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Solution

The fourth proportional to 256,245.70, 384,368.55 and 243,123.70 is: 364,685.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,245.70 : 384,368.55 = 243,123.70 : x
  2. Step 2: Convert to fraction form
    256,245.70/384,368.55 = 243,123.70/x
  3. Step 3: Cross multiply
    256,245.70x = 384,368.55 × 243,123.70
  4. Step 4: Simplify right side
    256,245.70x = 93,449,104,039.64
  5. Step 5: Solve for x
    x = 93,449,104,039.64/256,245.70
  6. Step 6: Final answer
    x = 364,685.55

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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.