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Finding the Fourth Proportional to 388,978.68, 536,057.76 and 281,366.20

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Solution

The fourth proportional to 388,978.68, 536,057.76 and 281,366.20 is: 387,755.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,978.68 : 536,057.76 = 281,366.20 : x
  2. Step 2: Convert to fraction form
    388,978.68/536,057.76 = 281,366.20/x
  3. Step 3: Cross multiply
    388,978.68x = 536,057.76 × 281,366.20
  4. Step 4: Simplify right side
    388,978.68x = 150,828,534,911.71
  5. Step 5: Solve for x
    x = 150,828,534,911.71/388,978.68
  6. Step 6: Final answer
    x = 387,755.27

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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.