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Finding the Fourth Proportional to 388,470.96, 536,081.58 and 216,388.26

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Solution

The fourth proportional to 388,470.96, 536,081.58 and 216,388.26 is: 298,611.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,470.96 : 536,081.58 = 216,388.26 : x
  2. Step 2: Convert to fraction form
    388,470.96/536,081.58 = 216,388.26/x
  3. Step 3: Cross multiply
    388,470.96x = 536,081.58 × 216,388.26
  4. Step 4: Simplify right side
    388,470.96x = 116,001,760,314.25
  5. Step 5: Solve for x
    x = 116,001,760,314.25/388,470.96
  6. Step 6: Final answer
    x = 298,611.15

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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.