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Finding the Fourth Proportional to 275,920.79, 380,804.51 and 155,067.17

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Solution

The fourth proportional to 275,920.79, 380,804.51 and 155,067.17 is: 214,011.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,920.79 : 380,804.51 = 155,067.17 : x
  2. Step 2: Convert to fraction form
    275,920.79/380,804.51 = 155,067.17/x
  3. Step 3: Cross multiply
    275,920.79x = 380,804.51 × 155,067.17
  4. Step 4: Simplify right side
    275,920.79x = 59,050,277,688.94
  5. Step 5: Solve for x
    x = 59,050,277,688.94/275,920.79
  6. Step 6: Final answer
    x = 214,011.70

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1.5x scale

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.