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Finding the Fourth Proportional to 289,999.92, 434,982.52 and 90,292.20

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Solution

The fourth proportional to 289,999.92, 434,982.52 and 90,292.20 is: 135,432.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,999.92 : 434,982.52 = 90,292.20 : x
  2. Step 2: Convert to fraction form
    289,999.92/434,982.52 = 90,292.20/x
  3. Step 3: Cross multiply
    289,999.92x = 434,982.52 × 90,292.20
  4. Step 4: Simplify right side
    289,999.92x = 39,275,528,692.34
  5. Step 5: Solve for x
    x = 39,275,528,692.34/289,999.92
  6. Step 6: Final answer
    x = 135,432.89

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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.