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Finding the Fourth Proportional to 354,485.38, 531,429.18 and 154,659.20

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Solution

The fourth proportional to 354,485.38, 531,429.18 and 154,659.20 is: 231,858.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,485.38 : 531,429.18 = 154,659.20 : x
  2. Step 2: Convert to fraction form
    354,485.38/531,429.18 = 154,659.20/x
  3. Step 3: Cross multiply
    354,485.38x = 531,429.18 × 154,659.20
  4. Step 4: Simplify right side
    354,485.38x = 82,190,411,835.46
  5. Step 5: Solve for x
    x = 82,190,411,835.46/354,485.38
  6. Step 6: Final answer
    x = 231,858.40

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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.