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Finding the Fourth Proportional to 612,615.28, 918,922.92 and 279,958

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Solution

The fourth proportional to 612,615.28, 918,922.92 and 279,958 is: 419,937

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,615.28 : 918,922.92 = 279,958 : x
  2. Step 2: Convert to fraction form
    612,615.28/918,922.92 = 279,958/x
  3. Step 3: Cross multiply
    612,615.28x = 918,922.92 × 279,958
  4. Step 4: Simplify right side
    612,615.28x = 257,259,822,837.36
  5. Step 5: Solve for x
    x = 257,259,822,837.36/612,615.28
  6. Step 6: Final answer
    x = 419,937

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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.