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Finding the Fourth Proportional to 289,880.80, 434,821.20 and 79,518.40

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Solution

The fourth proportional to 289,880.80, 434,821.20 and 79,518.40 is: 119,277.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,880.80 : 434,821.20 = 79,518.40 : x
  2. Step 2: Convert to fraction form
    289,880.80/434,821.20 = 79,518.40/x
  3. Step 3: Cross multiply
    289,880.80x = 434,821.20 × 79,518.40
  4. Step 4: Simplify right side
    289,880.80x = 34,576,286,110.08
  5. Step 5: Solve for x
    x = 34,576,286,110.08/289,880.80
  6. Step 6: Final answer
    x = 119,277.60

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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.