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Finding the Fourth Proportional to 289,931.82, 434,830.41 and 79,586.70

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Solution

The fourth proportional to 289,931.82, 434,830.41 and 79,586.70 is: 119,361.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,931.82 : 434,830.41 = 79,586.70 : x
  2. Step 2: Convert to fraction form
    289,931.82/434,830.41 = 79,586.70/x
  3. Step 3: Cross multiply
    289,931.82x = 434,830.41 × 79,586.70
  4. Step 4: Simplify right side
    289,931.82x = 34,606,717,391.55
  5. Step 5: Solve for x
    x = 34,606,717,391.55/289,931.82
  6. Step 6: Final answer
    x = 119,361.57

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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.