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Finding the Fourth Proportional to 404,649.36, 607,662.95 and 387,721.98

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Solution

The fourth proportional to 404,649.36, 607,662.95 and 387,721.98 is: 582,243.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,649.36 : 607,662.95 = 387,721.98 : x
  2. Step 2: Convert to fraction form
    404,649.36/607,662.95 = 387,721.98/x
  3. Step 3: Cross multiply
    404,649.36x = 607,662.95 × 387,721.98
  4. Step 4: Simplify right side
    404,649.36x = 235,604,280,208.03
  5. Step 5: Solve for x
    x = 235,604,280,208.03/404,649.36
  6. Step 6: Final answer
    x = 582,243.06

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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.