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Finding the Fourth Proportional to 405,282.47, 607,935.99 and 139,039.13

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Solution

The fourth proportional to 405,282.47, 607,935.99 and 139,039.13 is: 208,562.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,282.47 : 607,935.99 = 139,039.13 : x
  2. Step 2: Convert to fraction form
    405,282.47/607,935.99 = 139,039.13/x
  3. Step 3: Cross multiply
    405,282.47x = 607,935.99 × 139,039.13
  4. Step 4: Simplify right side
    405,282.47x = 84,526,888,105.61
  5. Step 5: Solve for x
    x = 84,526,888,105.61/405,282.47
  6. Step 6: Final answer
    x = 208,562.90

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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.