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Finding the Fourth Proportional to 388,107.90, 535,574.97 and 216,020.16

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Solution

The fourth proportional to 388,107.90, 535,574.97 and 216,020.16 is: 298,100.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,107.90 : 535,574.97 = 216,020.16 : x
  2. Step 2: Convert to fraction form
    388,107.90/535,574.97 = 216,020.16/x
  3. Step 3: Cross multiply
    388,107.90x = 535,574.97 × 216,020.16
  4. Step 4: Simplify right side
    388,107.90x = 115,694,990,711.40
  5. Step 5: Solve for x
    x = 115,694,990,711.40/388,107.90
  6. Step 6: Final answer
    x = 298,100.07

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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.