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Finding the Fourth Proportional to 356,685.63, 492,288.60 and 270,928.50

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Solution

The fourth proportional to 356,685.63, 492,288.60 and 270,928.50 is: 373,928.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,685.63 : 492,288.60 = 270,928.50 : x
  2. Step 2: Convert to fraction form
    356,685.63/492,288.60 = 270,928.50/x
  3. Step 3: Cross multiply
    356,685.63x = 492,288.60 × 270,928.50
  4. Step 4: Simplify right side
    356,685.63x = 133,375,011,965.10
  5. Step 5: Solve for x
    x = 133,375,011,965.10/356,685.63
  6. Step 6: Final answer
    x = 373,928.75

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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.