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Finding the Fourth Proportional to 328,010.60, 491,708.70 and 256,893.80

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Solution

The fourth proportional to 328,010.60, 491,708.70 and 256,893.80 is: 385,100.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,010.60 : 491,708.70 = 256,893.80 : x
  2. Step 2: Convert to fraction form
    328,010.60/491,708.70 = 256,893.80/x
  3. Step 3: Cross multiply
    328,010.60x = 491,708.70 × 256,893.80
  4. Step 4: Simplify right side
    328,010.60x = 126,316,916,436.06
  5. Step 5: Solve for x
    x = 126,316,916,436.06/328,010.60
  6. Step 6: Final answer
    x = 385,100.10

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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.