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Finding the Fourth Proportional to 388,009.24, 535,470.24 and 218,243.36

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Solution

The fourth proportional to 388,009.24, 535,470.24 and 218,243.36 is: 301,185.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,009.24 : 535,470.24 = 218,243.36 : x
  2. Step 2: Convert to fraction form
    388,009.24/535,470.24 = 218,243.36/x
  3. Step 3: Cross multiply
    388,009.24x = 535,470.24 × 218,243.36
  4. Step 4: Simplify right side
    388,009.24x = 116,862,826,514.70
  5. Step 5: Solve for x
    x = 116,862,826,514.70/388,009.24
  6. Step 6: Final answer
    x = 301,185.68

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1.5x scale

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.