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Finding the Fourth Proportional to 275,880.36, 380,726.16 and 155,021.28

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Solution

The fourth proportional to 275,880.36, 380,726.16 and 155,021.28 is: 213,935.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,880.36 : 380,726.16 = 155,021.28 : x
  2. Step 2: Convert to fraction form
    275,880.36/380,726.16 = 155,021.28/x
  3. Step 3: Cross multiply
    275,880.36x = 380,726.16 × 155,021.28
  4. Step 4: Simplify right side
    275,880.36x = 59,020,656,652.68
  5. Step 5: Solve for x
    x = 59,020,656,652.68/275,880.36
  6. Step 6: Final answer
    x = 213,935.70

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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.