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Finding the Fourth Proportional to 280,763.68, 421,366.44 and 130,926.76

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Solution

The fourth proportional to 280,763.68, 421,366.44 and 130,926.76 is: 196,493.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,763.68 : 421,366.44 = 130,926.76 : x
  2. Step 2: Convert to fraction form
    280,763.68/421,366.44 = 130,926.76/x
  3. Step 3: Cross multiply
    280,763.68x = 421,366.44 × 130,926.76
  4. Step 4: Simplify right side
    280,763.68x = 55,168,142,761.93
  5. Step 5: Solve for x
    x = 55,168,142,761.93/280,763.68
  6. Step 6: Final answer
    x = 196,493.16

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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.