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Finding the Fourth Proportional to 404,891.60, 607,337.40 and 138,628.40

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Solution

The fourth proportional to 404,891.60, 607,337.40 and 138,628.40 is: 207,942.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,891.60 : 607,337.40 = 138,628.40 : x
  2. Step 2: Convert to fraction form
    404,891.60/607,337.40 = 138,628.40/x
  3. Step 3: Cross multiply
    404,891.60x = 607,337.40 × 138,628.40
  4. Step 4: Simplify right side
    404,891.60x = 84,194,212,022.16
  5. Step 5: Solve for x
    x = 84,194,212,022.16/404,891.60
  6. Step 6: Final answer
    x = 207,942.60

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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.