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Finding the Fourth Proportional to 665,342.50, 918,172.65 and 363,536.50

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Solution

The fourth proportional to 665,342.50, 918,172.65 and 363,536.50 is: 501,680.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,342.50 : 918,172.65 = 363,536.50 : x
  2. Step 2: Convert to fraction form
    665,342.50/918,172.65 = 363,536.50/x
  3. Step 3: Cross multiply
    665,342.50x = 918,172.65 × 363,536.50
  4. Step 4: Simplify right side
    665,342.50x = 333,789,271,576.73
  5. Step 5: Solve for x
    x = 333,789,271,576.73/665,342.50
  6. Step 6: Final answer
    x = 501,680.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.