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Finding the Fourth Proportional to 885,670.78, 1,328,497.41 and 405,762.43

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Solution

The fourth proportional to 885,670.78, 1,328,497.41 and 405,762.43 is: 608,639.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,670.78 : 1,328,497.41 = 405,762.43 : x
  2. Step 2: Convert to fraction form
    885,670.78/1,328,497.41 = 405,762.43/x
  3. Step 3: Cross multiply
    885,670.78x = 1,328,497.41 × 405,762.43
  4. Step 4: Simplify right side
    885,670.78x = 539,054,330,238.00
  5. Step 5: Solve for x
    x = 539,054,330,238.00/885,670.78
  6. Step 6: Final answer
    x = 608,639.63

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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.