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Finding the Fourth Proportional to 539,319.15, 808,207.70 and 396,040.28

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Solution

The fourth proportional to 539,319.15, 808,207.70 and 396,040.28 is: 593,494.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,319.15 : 808,207.70 = 396,040.28 : x
  2. Step 2: Convert to fraction form
    539,319.15/808,207.70 = 396,040.28/x
  3. Step 3: Cross multiply
    539,319.15x = 808,207.70 × 396,040.28
  4. Step 4: Simplify right side
    539,319.15x = 320,082,797,784.92
  5. Step 5: Solve for x
    x = 320,082,797,784.92/539,319.15
  6. Step 6: Final answer
    x = 593,494.22

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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.