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Finding the Fourth Proportional to 486,259.85, 728,890.92 and 186,659.75

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Solution

The fourth proportional to 486,259.85, 728,890.92 and 186,659.75 is: 279,798.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,259.85 : 728,890.92 = 186,659.75 : x
  2. Step 2: Convert to fraction form
    486,259.85/728,890.92 = 186,659.75/x
  3. Step 3: Cross multiply
    486,259.85x = 728,890.92 × 186,659.75
  4. Step 4: Simplify right side
    486,259.85x = 136,054,593,260.02
  5. Step 5: Solve for x
    x = 136,054,593,260.02/486,259.85
  6. Step 6: Final answer
    x = 279,798.13

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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.