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Finding the Fourth Proportional to 265,590.89, 398,269.12 and 76,008.09

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Solution

The fourth proportional to 265,590.89, 398,269.12 and 76,008.09 is: 113,978.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,590.89 : 398,269.12 = 76,008.09 : x
  2. Step 2: Convert to fraction form
    265,590.89/398,269.12 = 76,008.09/x
  3. Step 3: Cross multiply
    265,590.89x = 398,269.12 × 76,008.09
  4. Step 4: Simplify right side
    265,590.89x = 30,271,673,931.49
  5. Step 5: Solve for x
    x = 30,271,673,931.49/265,590.89
  6. Step 6: Final answer
    x = 113,978.59

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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.