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Finding the Fourth Proportional to 280,418.40, 420,627.60 and 162,320.40

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Solution

The fourth proportional to 280,418.40, 420,627.60 and 162,320.40 is: 243,480.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,418.40 : 420,627.60 = 162,320.40 : x
  2. Step 2: Convert to fraction form
    280,418.40/420,627.60 = 162,320.40/x
  3. Step 3: Cross multiply
    280,418.40x = 420,627.60 × 162,320.40
  4. Step 4: Simplify right side
    280,418.40x = 68,276,440,283.04
  5. Step 5: Solve for x
    x = 68,276,440,283.04/280,418.40
  6. Step 6: Final answer
    x = 243,480.60

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