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Finding the Fourth Proportional to 438,010.40, 657,015.60 and 280,546.40

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Solution

The fourth proportional to 438,010.40, 657,015.60 and 280,546.40 is: 420,819.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,010.40 : 657,015.60 = 280,546.40 : x
  2. Step 2: Convert to fraction form
    438,010.40/657,015.60 = 280,546.40/x
  3. Step 3: Cross multiply
    438,010.40x = 657,015.60 × 280,546.40
  4. Step 4: Simplify right side
    438,010.40x = 184,323,361,323.84
  5. Step 5: Solve for x
    x = 184,323,361,323.84/438,010.40
  6. Step 6: Final answer
    x = 420,819.60

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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.