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Finding the Fourth Proportional to 388,381.36, 535,998.36 and 216,332.32

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Solution

The fourth proportional to 388,381.36, 535,998.36 and 216,332.32 is: 298,556.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,381.36 : 535,998.36 = 216,332.32 : x
  2. Step 2: Convert to fraction form
    388,381.36/535,998.36 = 216,332.32/x
  3. Step 3: Cross multiply
    388,381.36x = 535,998.36 × 216,332.32
  4. Step 4: Simplify right side
    388,381.36x = 115,953,768,735.00
  5. Step 5: Solve for x
    x = 115,953,768,735.00/388,381.36
  6. Step 6: Final answer
    x = 298,556.47

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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.