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Finding the Fourth Proportional to 393,945.60, 590,918.40 and 113,491.20

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Solution

The fourth proportional to 393,945.60, 590,918.40 and 113,491.20 is: 170,236.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,945.60 : 590,918.40 = 113,491.20 : x
  2. Step 2: Convert to fraction form
    393,945.60/590,918.40 = 113,491.20/x
  3. Step 3: Cross multiply
    393,945.60x = 590,918.40 × 113,491.20
  4. Step 4: Simplify right side
    393,945.60x = 67,064,038,318.08
  5. Step 5: Solve for x
    x = 67,064,038,318.08/393,945.60
  6. Step 6: Final answer
    x = 170,236.80

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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.