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Finding the Fourth Proportional to 390,314.43, 538,336.73 and 335,959.11

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Solution

The fourth proportional to 390,314.43, 538,336.73 and 335,959.11 is: 463,367.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,314.43 : 538,336.73 = 335,959.11 : x
  2. Step 2: Convert to fraction form
    390,314.43/538,336.73 = 335,959.11/x
  3. Step 3: Cross multiply
    390,314.43x = 538,336.73 × 335,959.11
  4. Step 4: Simplify right side
    390,314.43x = 180,859,128,691.11
  5. Step 5: Solve for x
    x = 180,859,128,691.11/390,314.43
  6. Step 6: Final answer
    x = 463,367.77

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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.