Home / 728,129.12-1,004,822.82-405,859.64

Finding the Fourth Proportional to 728,129.12, 1,004,822.82 and 405,859.64

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Solution

The fourth proportional to 728,129.12, 1,004,822.82 and 405,859.64 is: 560,088.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,129.12 : 1,004,822.82 = 405,859.64 : x
  2. Step 2: Convert to fraction form
    728,129.12/1,004,822.82 = 405,859.64/x
  3. Step 3: Cross multiply
    728,129.12x = 1,004,822.82 × 405,859.64
  4. Step 4: Simplify right side
    728,129.12x = 407,817,027,988.99
  5. Step 5: Solve for x
    x = 407,817,027,988.99/728,129.12
  6. Step 6: Final answer
    x = 560,088.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.