Home / 728,155.91-1,004,859.86-405,886.47

Finding the Fourth Proportional to 728,155.91, 1,004,859.86 and 405,886.47

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Solution

The fourth proportional to 728,155.91, 1,004,859.86 and 405,886.47 is: 560,125.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,155.91 : 1,004,859.86 = 405,886.47 : x
  2. Step 2: Convert to fraction form
    728,155.91/1,004,859.86 = 405,886.47/x
  3. Step 3: Cross multiply
    728,155.91x = 1,004,859.86 × 405,886.47
  4. Step 4: Simplify right side
    728,155.91x = 407,859,019,390.66
  5. Step 5: Solve for x
    x = 407,859,019,390.66/728,155.91
  6. Step 6: Final answer
    x = 560,125.95

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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.