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Finding the Fourth Proportional to 388,330.09, 535,894.41 and 218,564.20

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Solution

The fourth proportional to 388,330.09, 535,894.41 and 218,564.20 is: 301,617.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,330.09 : 535,894.41 = 218,564.20 : x
  2. Step 2: Convert to fraction form
    388,330.09/535,894.41 = 218,564.20/x
  3. Step 3: Cross multiply
    388,330.09x = 535,894.41 × 218,564.20
  4. Step 4: Simplify right side
    388,330.09x = 117,127,333,006.12
  5. Step 5: Solve for x
    x = 117,127,333,006.12/388,330.09
  6. Step 6: Final answer
    x = 301,617.97

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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.