Home / 399,185.16-549,939.78-278,107.44

Finding the Fourth Proportional to 399,185.16, 549,939.78 and 278,107.44

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Solution

The fourth proportional to 399,185.16, 549,939.78 and 278,107.44 is: 383,136.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,185.16 : 549,939.78 = 278,107.44 : x
  2. Step 2: Convert to fraction form
    399,185.16/549,939.78 = 278,107.44/x
  3. Step 3: Cross multiply
    399,185.16x = 549,939.78 × 278,107.44
  4. Step 4: Simplify right side
    399,185.16x = 152,942,344,369.96
  5. Step 5: Solve for x
    x = 152,942,344,369.96/399,185.16
  6. Step 6: Final answer
    x = 383,136.35

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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.