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Finding the Fourth Proportional to 390,338.80, 538,370.28 and 335,983.41

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Solution

The fourth proportional to 390,338.80, 538,370.28 and 335,983.41 is: 463,401.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,338.80 : 538,370.28 = 335,983.41 : x
  2. Step 2: Convert to fraction form
    390,338.80/538,370.28 = 335,983.41/x
  3. Step 3: Cross multiply
    390,338.80x = 538,370.28 × 335,983.41
  4. Step 4: Simplify right side
    390,338.80x = 180,883,482,517.06
  5. Step 5: Solve for x
    x = 180,883,482,517.06/390,338.80
  6. Step 6: Final answer
    x = 463,401.24

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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.