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Finding the Fourth Proportional to 388,745.88, 536,485.95 and 216,663.81

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Solution

The fourth proportional to 388,745.88, 536,485.95 and 216,663.81 is: 299,005.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,745.88 : 536,485.95 = 216,663.81 : x
  2. Step 2: Convert to fraction form
    388,745.88/536,485.95 = 216,663.81/x
  3. Step 3: Cross multiply
    388,745.88x = 536,485.95 × 216,663.81
  4. Step 4: Simplify right side
    388,745.88x = 116,237,089,938.47
  5. Step 5: Solve for x
    x = 116,237,089,938.47/388,745.88
  6. Step 6: Final answer
    x = 299,005.33

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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.