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Finding the Fourth Proportional to 290,830.80, 436,246.20 and 178,856.40

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Solution

The fourth proportional to 290,830.80, 436,246.20 and 178,856.40 is: 268,284.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,830.80 : 436,246.20 = 178,856.40 : x
  2. Step 2: Convert to fraction form
    290,830.80/436,246.20 = 178,856.40/x
  3. Step 3: Cross multiply
    290,830.80x = 436,246.20 × 178,856.40
  4. Step 4: Simplify right side
    290,830.80x = 78,025,424,845.68
  5. Step 5: Solve for x
    x = 78,025,424,845.68/290,830.80
  6. Step 6: Final answer
    x = 268,284.60

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1.5x scale

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.