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Finding the Fourth Proportional to 440,783.36, 661,172.28 and 212,813.03

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Solution

The fourth proportional to 440,783.36, 661,172.28 and 212,813.03 is: 319,218.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,783.36 : 661,172.28 = 212,813.03 : x
  2. Step 2: Convert to fraction form
    440,783.36/661,172.28 = 212,813.03/x
  3. Step 3: Cross multiply
    440,783.36x = 661,172.28 × 212,813.03
  4. Step 4: Simplify right side
    440,783.36x = 140,706,072,952.95
  5. Step 5: Solve for x
    x = 140,706,072,952.95/440,783.36
  6. Step 6: Final answer
    x = 319,218.21

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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.