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Finding the Fourth Proportional to 289,677.60, 434,516.40 and 123,789.60

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Solution

The fourth proportional to 289,677.60, 434,516.40 and 123,789.60 is: 185,684.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,677.60 : 434,516.40 = 123,789.60 : x
  2. Step 2: Convert to fraction form
    289,677.60/434,516.40 = 123,789.60/x
  3. Step 3: Cross multiply
    289,677.60x = 434,516.40 × 123,789.60
  4. Step 4: Simplify right side
    289,677.60x = 53,788,611,349.44
  5. Step 5: Solve for x
    x = 53,788,611,349.44/289,677.60
  6. Step 6: Final answer
    x = 185,684.40

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Similar ratio
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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.