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Finding the Fourth Proportional to 287,906.10, 428,904.33 and 274,952.28

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Solution

The fourth proportional to 287,906.10, 428,904.33 and 274,952.28 is: 409,606.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,906.10 : 428,904.33 = 274,952.28 : x
  2. Step 2: Convert to fraction form
    287,906.10/428,904.33 = 274,952.28/x
  3. Step 3: Cross multiply
    287,906.10x = 428,904.33 × 274,952.28
  4. Step 4: Simplify right side
    287,906.10x = 117,928,223,435.37
  5. Step 5: Solve for x
    x = 117,928,223,435.37/287,906.10
  6. Step 6: Final answer
    x = 409,606.55

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.