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Finding the Fourth Proportional to 389,912.40, 585,559.80 and 301,381.20

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Solution

The fourth proportional to 389,912.40, 585,559.80 and 301,381.20 is: 452,606.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,912.40 : 585,559.80 = 301,381.20 : x
  2. Step 2: Convert to fraction form
    389,912.40/585,559.80 = 301,381.20/x
  3. Step 3: Cross multiply
    389,912.40x = 585,559.80 × 301,381.20
  4. Step 4: Simplify right side
    389,912.40x = 176,476,715,195.76
  5. Step 5: Solve for x
    x = 176,476,715,195.76/389,912.40
  6. Step 6: Final answer
    x = 452,606.06

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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.