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Finding the Fourth Proportional to 388,627.60, 538,751.86 and 367,340.88

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Solution

The fourth proportional to 388,627.60, 538,751.86 and 367,340.88 is: 509,242.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,627.60 : 538,751.86 = 367,340.88 : x
  2. Step 2: Convert to fraction form
    388,627.60/538,751.86 = 367,340.88/x
  3. Step 3: Cross multiply
    388,627.60x = 538,751.86 × 367,340.88
  4. Step 4: Simplify right side
    388,627.60x = 197,905,582,354.04
  5. Step 5: Solve for x
    x = 197,905,582,354.04/388,627.60
  6. Step 6: Final answer
    x = 509,242.22

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.