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Finding the Fourth Proportional to 388,643.76, 536,366.64 and 227,489.04

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Solution

The fourth proportional to 388,643.76, 536,366.64 and 227,489.04 is: 313,957.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,643.76 : 536,366.64 = 227,489.04 : x
  2. Step 2: Convert to fraction form
    388,643.76/536,366.64 = 227,489.04/x
  3. Step 3: Cross multiply
    388,643.76x = 536,366.64 × 227,489.04
  4. Step 4: Simplify right side
    388,643.76x = 122,017,532,021.63
  5. Step 5: Solve for x
    x = 122,017,532,021.63/388,643.76
  6. Step 6: Final answer
    x = 313,957.27

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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.