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Finding the Fourth Proportional to 400,239.08, 600,390.16 and 134,000.72

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Solution

The fourth proportional to 400,239.08, 600,390.16 and 134,000.72 is: 201,011.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,239.08 : 600,390.16 = 134,000.72 : x
  2. Step 2: Convert to fraction form
    400,239.08/600,390.16 = 134,000.72/x
  3. Step 3: Cross multiply
    400,239.08x = 600,390.16 × 134,000.72
  4. Step 4: Simplify right side
    400,239.08x = 80,452,713,720.92
  5. Step 5: Solve for x
    x = 80,452,713,720.92/400,239.08
  6. Step 6: Final answer
    x = 201,011.64

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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.