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Finding the Fourth Proportional to 388,313.82, 535,831.83 and 218,545.02

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Solution

The fourth proportional to 388,313.82, 535,831.83 and 218,545.02 is: 301,568.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,313.82 : 535,831.83 = 218,545.02 : x
  2. Step 2: Convert to fraction form
    388,313.82/535,831.83 = 218,545.02/x
  3. Step 3: Cross multiply
    388,313.82x = 535,831.83 × 218,545.02
  4. Step 4: Simplify right side
    388,313.82x = 117,103,378,003.99
  5. Step 5: Solve for x
    x = 117,103,378,003.99/388,313.82
  6. Step 6: Final answer
    x = 301,568.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.