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Finding the Fourth Proportional to 279,965.40, 419,948.10 and 153,556.80

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Solution

The fourth proportional to 279,965.40, 419,948.10 and 153,556.80 is: 230,335.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,965.40 : 419,948.10 = 153,556.80 : x
  2. Step 2: Convert to fraction form
    279,965.40/419,948.10 = 153,556.80/x
  3. Step 3: Cross multiply
    279,965.40x = 419,948.10 × 153,556.80
  4. Step 4: Simplify right side
    279,965.40x = 64,485,886,402.08
  5. Step 5: Solve for x
    x = 64,485,886,402.08/279,965.40
  6. Step 6: Final answer
    x = 230,335.20

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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.