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Finding the Fourth Proportional to 388,095.72, 535,571.28 and 218,329.96

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Solution

The fourth proportional to 388,095.72, 535,571.28 and 218,329.96 is: 301,294.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,095.72 : 535,571.28 = 218,329.96 : x
  2. Step 2: Convert to fraction form
    388,095.72/535,571.28 = 218,329.96/x
  3. Step 3: Cross multiply
    388,095.72x = 535,571.28 × 218,329.96
  4. Step 4: Simplify right side
    388,095.72x = 116,931,256,139.55
  5. Step 5: Solve for x
    x = 116,931,256,139.55/388,095.72
  6. Step 6: Final answer
    x = 301,294.89

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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.