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Finding the Fourth Proportional to 425,138.64, 636,209.61 and 265,289.87

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Solution

The fourth proportional to 425,138.64, 636,209.61 and 265,289.87 is: 396,999.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,138.64 : 636,209.61 = 265,289.87 : x
  2. Step 2: Convert to fraction form
    425,138.64/636,209.61 = 265,289.87/x
  3. Step 3: Cross multiply
    425,138.64x = 636,209.61 × 265,289.87
  4. Step 4: Simplify right side
    425,138.64x = 168,779,961,548.60
  5. Step 5: Solve for x
    x = 168,779,961,548.60/425,138.64
  6. Step 6: Final answer
    x = 396,999.82

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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.