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Finding the Fourth Proportional to 289,999.90, 434,982.54 and 90,292.18

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Solution

The fourth proportional to 289,999.90, 434,982.54 and 90,292.18 is: 135,432.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,999.90 : 434,982.54 = 90,292.18 : x
  2. Step 2: Convert to fraction form
    289,999.90/434,982.54 = 90,292.18/x
  3. Step 3: Cross multiply
    289,999.90x = 434,982.54 × 90,292.18
  4. Step 4: Simplify right side
    289,999.90x = 39,275,521,798.54
  5. Step 5: Solve for x
    x = 39,275,521,798.54/289,999.90
  6. Step 6: Final answer
    x = 135,432.88

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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.