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Finding the Fourth Proportional to 320,207.40, 479,619.90 and 264,911.40

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Solution

The fourth proportional to 320,207.40, 479,619.90 and 264,911.40 is: 396,795.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,207.40 : 479,619.90 = 264,911.40 : x
  2. Step 2: Convert to fraction form
    320,207.40/479,619.90 = 264,911.40/x
  3. Step 3: Cross multiply
    320,207.40x = 479,619.90 × 264,911.40
  4. Step 4: Simplify right side
    320,207.40x = 127,056,779,176.86
  5. Step 5: Solve for x
    x = 127,056,779,176.86/320,207.40
  6. Step 6: Final answer
    x = 396,795.26

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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.