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Finding the Fourth Proportional to 275,903.76, 380,754.77 and 155,056.06

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Solution

The fourth proportional to 275,903.76, 380,754.77 and 155,056.06 is: 213,981.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,903.76 : 380,754.77 = 155,056.06 : x
  2. Step 2: Convert to fraction form
    275,903.76/380,754.77 = 155,056.06/x
  3. Step 3: Cross multiply
    275,903.76x = 380,754.77 × 155,056.06
  4. Step 4: Simplify right side
    275,903.76x = 59,038,333,687.13
  5. Step 5: Solve for x
    x = 59,038,333,687.13/275,903.76
  6. Step 6: Final answer
    x = 213,981.62

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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.