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Finding the Fourth Proportional to 521,105.35, 718,554.32 and 339,480.47

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Solution

The fourth proportional to 521,105.35, 718,554.32 and 339,480.47 is: 468,111.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,105.35 : 718,554.32 = 339,480.47 : x
  2. Step 2: Convert to fraction form
    521,105.35/718,554.32 = 339,480.47/x
  3. Step 3: Cross multiply
    521,105.35x = 718,554.32 × 339,480.47
  4. Step 4: Simplify right side
    521,105.35x = 243,935,158,274.13
  5. Step 5: Solve for x
    x = 243,935,158,274.13/521,105.35
  6. Step 6: Final answer
    x = 468,111.02

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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.