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Finding the Fourth Proportional to 390,313.43, 538,335.35 and 335,958.11

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Solution

The fourth proportional to 390,313.43, 538,335.35 and 335,958.11 is: 463,366.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,313.43 : 538,335.35 = 335,958.11 : x
  2. Step 2: Convert to fraction form
    390,313.43/538,335.35 = 335,958.11/x
  3. Step 3: Cross multiply
    390,313.43x = 538,335.35 × 335,958.11
  4. Step 4: Simplify right side
    390,313.43x = 180,858,126,823.23
  5. Step 5: Solve for x
    x = 180,858,126,823.23/390,313.43
  6. Step 6: Final answer
    x = 463,366.39

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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.