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Finding the Fourth Proportional to 388,064.64, 535,527.12 and 218,300.04

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Solution

The fourth proportional to 388,064.64, 535,527.12 and 218,300.04 is: 301,252.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,064.64 : 535,527.12 = 218,300.04 : x
  2. Step 2: Convert to fraction form
    388,064.64/535,527.12 = 218,300.04/x
  3. Step 3: Cross multiply
    388,064.64x = 535,527.12 × 218,300.04
  4. Step 4: Simplify right side
    388,064.64x = 116,905,591,717.09
  5. Step 5: Solve for x
    x = 116,905,591,717.09/388,064.64
  6. Step 6: Final answer
    x = 301,252.88

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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.