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Finding the Fourth Proportional to 387,865.02, 535,250.52 and 218,095.50

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Solution

The fourth proportional to 387,865.02, 535,250.52 and 218,095.50 is: 300,969.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,865.02 : 535,250.52 = 218,095.50 : x
  2. Step 2: Convert to fraction form
    387,865.02/535,250.52 = 218,095.50/x
  3. Step 3: Cross multiply
    387,865.02x = 535,250.52 × 218,095.50
  4. Step 4: Simplify right side
    387,865.02x = 116,735,729,784.66
  5. Step 5: Solve for x
    x = 116,735,729,784.66/387,865.02
  6. Step 6: Final answer
    x = 300,969.99

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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.