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Finding the Fourth Proportional to 388,433.07, 535,609.21 and 265,945.61

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Solution

The fourth proportional to 388,433.07, 535,609.21 and 265,945.61 is: 366,711.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,433.07 : 535,609.21 = 265,945.61 : x
  2. Step 2: Convert to fraction form
    388,433.07/535,609.21 = 265,945.61/x
  3. Step 3: Cross multiply
    388,433.07x = 535,609.21 × 265,945.61
  4. Step 4: Simplify right side
    388,433.07x = 142,442,918,075.07
  5. Step 5: Solve for x
    x = 142,442,918,075.07/388,433.07
  6. Step 6: Final answer
    x = 366,711.61

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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.