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Finding the Fourth Proportional to 289,715.52, 434,573.64 and 79,355.28

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Solution

The fourth proportional to 289,715.52, 434,573.64 and 79,355.28 is: 119,033.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,715.52 : 434,573.64 = 79,355.28 : x
  2. Step 2: Convert to fraction form
    289,715.52/434,573.64 = 79,355.28/x
  3. Step 3: Cross multiply
    289,715.52x = 434,573.64 × 79,355.28
  4. Step 4: Simplify right side
    289,715.52x = 34,485,712,882.82
  5. Step 5: Solve for x
    x = 34,485,712,882.82/289,715.52
  6. Step 6: Final answer
    x = 119,033.02

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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.