Home / 389,727.68-538,187.64-286,851.20

Finding the Fourth Proportional to 389,727.68, 538,187.64 and 286,851.20

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Solution

The fourth proportional to 389,727.68, 538,187.64 and 286,851.20 is: 396,122.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,727.68 : 538,187.64 = 286,851.20 : x
  2. Step 2: Convert to fraction form
    389,727.68/538,187.64 = 286,851.20/x
  3. Step 3: Cross multiply
    389,727.68x = 538,187.64 × 286,851.20
  4. Step 4: Simplify right side
    389,727.68x = 154,379,770,359.17
  5. Step 5: Solve for x
    x = 154,379,770,359.17/389,727.68
  6. Step 6: Final answer
    x = 396,122.16

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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.