Home / 319,684.32-479,616.39-139,785.55

Finding the Fourth Proportional to 319,684.32, 479,616.39 and 139,785.55

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Solution

The fourth proportional to 319,684.32, 479,616.39 and 139,785.55 is: 209,717.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,684.32 : 479,616.39 = 139,785.55 : x
  2. Step 2: Convert to fraction form
    319,684.32/479,616.39 = 139,785.55/x
  3. Step 3: Cross multiply
    319,684.32x = 479,616.39 × 139,785.55
  4. Step 4: Simplify right side
    319,684.32x = 67,043,439,666.12
  5. Step 5: Solve for x
    x = 67,043,439,666.12/319,684.32
  6. Step 6: Final answer
    x = 209,717.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.