Home / 256,895.40-385,343.10-172,914.60

Finding the Fourth Proportional to 256,895.40, 385,343.10 and 172,914.60

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Solution

The fourth proportional to 256,895.40, 385,343.10 and 172,914.60 is: 259,371.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,895.40 : 385,343.10 = 172,914.60 : x
  2. Step 2: Convert to fraction form
    256,895.40/385,343.10 = 172,914.60/x
  3. Step 3: Cross multiply
    256,895.40x = 385,343.10 × 172,914.60
  4. Step 4: Simplify right side
    256,895.40x = 66,631,447,999.26
  5. Step 5: Solve for x
    x = 66,631,447,999.26/256,895.40
  6. Step 6: Final answer
    x = 259,371.90

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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.