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Finding the Fourth Proportional to 404,455.20, 607,071.60 and 205,000.80

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Solution

The fourth proportional to 404,455.20, 607,071.60 and 205,000.80 is: 307,698.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,455.20 : 607,071.60 = 205,000.80 : x
  2. Step 2: Convert to fraction form
    404,455.20/607,071.60 = 205,000.80/x
  3. Step 3: Cross multiply
    404,455.20x = 607,071.60 × 205,000.80
  4. Step 4: Simplify right side
    404,455.20x = 124,450,163,657.28
  5. Step 5: Solve for x
    x = 124,450,163,657.28/404,455.20
  6. Step 6: Final answer
    x = 307,698.27

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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.