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Finding the Fourth Proportional to 289,682.10, 434,523.15 and 90,000.90

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Solution

The fourth proportional to 289,682.10, 434,523.15 and 90,000.90 is: 135,001.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,682.10 : 434,523.15 = 90,000.90 : x
  2. Step 2: Convert to fraction form
    289,682.10/434,523.15 = 90,000.90/x
  3. Step 3: Cross multiply
    289,682.10x = 434,523.15 × 90,000.90
  4. Step 4: Simplify right side
    289,682.10x = 39,107,474,570.84
  5. Step 5: Solve for x
    x = 39,107,474,570.84/289,682.10
  6. Step 6: Final answer
    x = 135,001.35

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Double scale
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Similar ratio
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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.