Home / 646,685.19-892,382.84-388,408.66

Finding the Fourth Proportional to 646,685.19, 892,382.84 and 388,408.66

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Solution

The fourth proportional to 646,685.19, 892,382.84 and 388,408.66 is: 535,978.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,685.19 : 892,382.84 = 388,408.66 : x
  2. Step 2: Convert to fraction form
    646,685.19/892,382.84 = 388,408.66/x
  3. Step 3: Cross multiply
    646,685.19x = 892,382.84 × 388,408.66
  4. Step 4: Simplify right side
    646,685.19x = 346,609,226,486.98
  5. Step 5: Solve for x
    x = 346,609,226,486.98/646,685.19
  6. Step 6: Final answer
    x = 535,978.30

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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.