Home / 782,320.51-1,079,479.00-455,687.30

Finding the Fourth Proportional to 782,320.51, 1,079,479.00 and 455,687.30

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Solution

The fourth proportional to 782,320.51, 1,079,479.00 and 455,687.30 is: 628,776.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    782,320.51 : 1,079,479.00 = 455,687.30 : x
  2. Step 2: Convert to fraction form
    782,320.51/1,079,479.00 = 455,687.30/x
  3. Step 3: Cross multiply
    782,320.51x = 1,079,479.00 × 455,687.30
  4. Step 4: Simplify right side
    782,320.51x = 491,904,874,185.01
  5. Step 5: Solve for x
    x = 491,904,874,185.01/782,320.51
  6. Step 6: Final answer
    x = 628,776.65

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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.