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Finding the Fourth Proportional to 289,711.52, 434,567.64 and 79,351.28

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Solution

The fourth proportional to 289,711.52, 434,567.64 and 79,351.28 is: 119,027.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,711.52 : 434,567.64 = 79,351.28 : x
  2. Step 2: Convert to fraction form
    289,711.52/434,567.64 = 79,351.28/x
  3. Step 3: Cross multiply
    289,711.52x = 434,567.64 × 79,351.28
  4. Step 4: Simplify right side
    289,711.52x = 34,483,498,480.58
  5. Step 5: Solve for x
    x = 34,483,498,480.58/289,711.52
  6. Step 6: Final answer
    x = 119,027.02

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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.