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Finding the Fourth Proportional to 289,393.68, 434,120.61 and 79,031.64

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Solution

The fourth proportional to 289,393.68, 434,120.61 and 79,031.64 is: 118,555.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,393.68 : 434,120.61 = 79,031.64 : x
  2. Step 2: Convert to fraction form
    289,393.68/434,120.61 = 79,031.64/x
  3. Step 3: Cross multiply
    289,393.68x = 434,120.61 × 79,031.64
  4. Step 4: Simplify right side
    289,393.68x = 34,309,263,766.10
  5. Step 5: Solve for x
    x = 34,309,263,766.10/289,393.68
  6. Step 6: Final answer
    x = 118,555.68

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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.