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Finding the Fourth Proportional to 266,322.93, 398,708 and 139,662.82

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Solution

The fourth proportional to 266,322.93, 398,708 and 139,662.82 is: 209,087.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,322.93 : 398,708 = 139,662.82 : x
  2. Step 2: Convert to fraction form
    266,322.93/398,708 = 139,662.82/x
  3. Step 3: Cross multiply
    266,322.93x = 398,708 × 139,662.82
  4. Step 4: Simplify right side
    266,322.93x = 55,684,683,636.56
  5. Step 5: Solve for x
    x = 55,684,683,636.56/266,322.93
  6. Step 6: Final answer
    x = 209,087.08

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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.