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Finding the Fourth Proportional to 289,853.70, 434,780.55 and 79,512.90

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Solution

The fourth proportional to 289,853.70, 434,780.55 and 79,512.90 is: 119,269.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,853.70 : 434,780.55 = 79,512.90 : x
  2. Step 2: Convert to fraction form
    289,853.70/434,780.55 = 79,512.90/x
  3. Step 3: Cross multiply
    289,853.70x = 434,780.55 × 79,512.90
  4. Step 4: Simplify right side
    289,853.70x = 34,570,662,394.10
  5. Step 5: Solve for x
    x = 34,570,662,394.10/289,853.70
  6. Step 6: Final answer
    x = 119,269.35

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1.5x scale

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.