Home / 390,194.51-538,309.06-309,297.38

Finding the Fourth Proportional to 390,194.51, 538,309.06 and 309,297.38

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Solution

The fourth proportional to 390,194.51, 538,309.06 and 309,297.38 is: 426,704.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,194.51 : 538,309.06 = 309,297.38 : x
  2. Step 2: Convert to fraction form
    390,194.51/538,309.06 = 309,297.38/x
  3. Step 3: Cross multiply
    390,194.51x = 538,309.06 × 309,297.38
  4. Step 4: Simplify right side
    390,194.51x = 166,497,578,423.47
  5. Step 5: Solve for x
    x = 166,497,578,423.47/390,194.51
  6. Step 6: Final answer
    x = 426,704.06

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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.