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Finding the Fourth Proportional to 298,005.60, 446,965.20 and 87,621.60

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Solution

The fourth proportional to 298,005.60, 446,965.20 and 87,621.60 is: 131,419.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,005.60 : 446,965.20 = 87,621.60 : x
  2. Step 2: Convert to fraction form
    298,005.60/446,965.20 = 87,621.60/x
  3. Step 3: Cross multiply
    298,005.60x = 446,965.20 × 87,621.60
  4. Step 4: Simplify right side
    298,005.60x = 39,163,805,968.32
  5. Step 5: Solve for x
    x = 39,163,805,968.32/298,005.60
  6. Step 6: Final answer
    x = 131,419.70

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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.