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Finding the Fourth Proportional to 449,000.10, 673,500.15 and 431,285.40

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Solution

The fourth proportional to 449,000.10, 673,500.15 and 431,285.40 is: 646,928.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,000.10 : 673,500.15 = 431,285.40 : x
  2. Step 2: Convert to fraction form
    449,000.10/673,500.15 = 431,285.40/x
  3. Step 3: Cross multiply
    449,000.10x = 673,500.15 × 431,285.40
  4. Step 4: Simplify right side
    449,000.10x = 290,470,781,592.81
  5. Step 5: Solve for x
    x = 290,470,781,592.81/449,000.10
  6. Step 6: Final answer
    x = 646,928.10

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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.