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Finding the Fourth Proportional to 545,887.78, 818,831.67 and 213,230.50

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Solution

The fourth proportional to 545,887.78, 818,831.67 and 213,230.50 is: 319,845.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,887.78 : 818,831.67 = 213,230.50 : x
  2. Step 2: Convert to fraction form
    545,887.78/818,831.67 = 213,230.50/x
  3. Step 3: Cross multiply
    545,887.78x = 818,831.67 × 213,230.50
  4. Step 4: Simplify right side
    545,887.78x = 174,599,886,409.94
  5. Step 5: Solve for x
    x = 174,599,886,409.94/545,887.78
  6. Step 6: Final answer
    x = 319,845.75

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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.