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Finding the Fourth Proportional to 289,701.60, 434,552.40 and 278,037.60

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Solution

The fourth proportional to 289,701.60, 434,552.40 and 278,037.60 is: 417,056.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,701.60 : 434,552.40 = 278,037.60 : x
  2. Step 2: Convert to fraction form
    289,701.60/434,552.40 = 278,037.60/x
  3. Step 3: Cross multiply
    289,701.60x = 434,552.40 × 278,037.60
  4. Step 4: Simplify right side
    289,701.60x = 120,821,906,370.24
  5. Step 5: Solve for x
    x = 120,821,906,370.24/289,701.60
  6. Step 6: Final answer
    x = 417,056.40

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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.