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Finding the Fourth Proportional to 656,996.50, 906,656.40 and 355,190.50

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Solution

The fourth proportional to 656,996.50, 906,656.40 and 355,190.50 is: 490,163.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,996.50 : 906,656.40 = 355,190.50 : x
  2. Step 2: Convert to fraction form
    656,996.50/906,656.40 = 355,190.50/x
  3. Step 3: Cross multiply
    656,996.50x = 906,656.40 × 355,190.50
  4. Step 4: Simplify right side
    656,996.50x = 322,035,740,044.20
  5. Step 5: Solve for x
    x = 322,035,740,044.20/656,996.50
  6. Step 6: Final answer
    x = 490,163.55

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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.