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Finding the Fourth Proportional to 262,245.60, 393,368.40 and 256,996.80

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Solution

The fourth proportional to 262,245.60, 393,368.40 and 256,996.80 is: 385,495.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,245.60 : 393,368.40 = 256,996.80 : x
  2. Step 2: Convert to fraction form
    262,245.60/393,368.40 = 256,996.80/x
  3. Step 3: Cross multiply
    262,245.60x = 393,368.40 × 256,996.80
  4. Step 4: Simplify right side
    262,245.60x = 101,094,420,021.12
  5. Step 5: Solve for x
    x = 101,094,420,021.12/262,245.60
  6. Step 6: Final answer
    x = 385,495.20

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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.