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Finding the Fourth Proportional to 279,574.12, 418,730.28 and 129,499.12

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Solution

The fourth proportional to 279,574.12, 418,730.28 and 129,499.12 is: 193,956.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,574.12 : 418,730.28 = 129,499.12 : x
  2. Step 2: Convert to fraction form
    279,574.12/418,730.28 = 129,499.12/x
  3. Step 3: Cross multiply
    279,574.12x = 418,730.28 × 129,499.12
  4. Step 4: Simplify right side
    279,574.12x = 54,225,202,777.35
  5. Step 5: Solve for x
    x = 54,225,202,777.35/279,574.12
  6. Step 6: Final answer
    x = 193,956.45

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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.