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Finding the Fourth Proportional to 290,738.40, 436,276.80 and 122,246.40

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Solution

The fourth proportional to 290,738.40, 436,276.80 and 122,246.40 is: 183,440.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,738.40 : 436,276.80 = 122,246.40 : x
  2. Step 2: Convert to fraction form
    290,738.40/436,276.80 = 122,246.40/x
  3. Step 3: Cross multiply
    290,738.40x = 436,276.80 × 122,246.40
  4. Step 4: Simplify right side
    290,738.40x = 53,333,268,203.52
  5. Step 5: Solve for x
    x = 53,333,268,203.52/290,738.40
  6. Step 6: Final answer
    x = 183,440.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.