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Finding the Fourth Proportional to 886,687.40, 1,330,203.90 and 381,247.40

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Solution

The fourth proportional to 886,687.40, 1,330,203.90 and 381,247.40 is: 571,945.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    886,687.40 : 1,330,203.90 = 381,247.40 : x
  2. Step 2: Convert to fraction form
    886,687.40/1,330,203.90 = 381,247.40/x
  3. Step 3: Cross multiply
    886,687.40x = 1,330,203.90 × 381,247.40
  4. Step 4: Simplify right side
    886,687.40x = 507,136,778,344.86
  5. Step 5: Solve for x
    x = 507,136,778,344.86/886,687.40
  6. Step 6: Final answer
    x = 571,945.40

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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.