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Finding the Fourth Proportional to 289,913.04, 434,910.56 and 90,253.58

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Solution

The fourth proportional to 289,913.04, 434,910.56 and 90,253.58 is: 135,393.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,913.04 : 434,910.56 = 90,253.58 : x
  2. Step 2: Convert to fraction form
    289,913.04/434,910.56 = 90,253.58/x
  3. Step 3: Cross multiply
    289,913.04x = 434,910.56 × 90,253.58
  4. Step 4: Simplify right side
    289,913.04x = 39,252,232,393.98
  5. Step 5: Solve for x
    x = 39,252,232,393.98/289,913.04
  6. Step 6: Final answer
    x = 135,393.12

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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.