Home / 390,287,758.05-538,597,979.82-225,275,196.33

Finding the Fourth Proportional to 390,287,758.05, 538,597,979.82 and 225,275,196.33

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Solution

The fourth proportional to 390,287,758.05, 538,597,979.82 and 225,275,196.33 is: 310,880,275.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,287,758.05 : 538,597,979.82 = 225,275,196.33 : x
  2. Step 2: Convert to fraction form
    390,287,758.05/538,597,979.82 = 225,275,196.33/x
  3. Step 3: Cross multiply
    390,287,758.05x = 538,597,979.82 × 225,275,196.33
  4. Step 4: Simplify right side
    390,287,758.05x = 121,332,765,646,891,904
  5. Step 5: Solve for x
    x = 121,332,765,646,891,904/390,287,758.05
  6. Step 6: Final answer
    x = 310,880,275.24

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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.