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Finding the Fourth Proportional to 520,680.78, 718,327.44 and 339,326.64

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Solution

The fourth proportional to 520,680.78, 718,327.44 and 339,326.64 is: 468,132.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,680.78 : 718,327.44 = 339,326.64 : x
  2. Step 2: Convert to fraction form
    520,680.78/718,327.44 = 339,326.64/x
  3. Step 3: Cross multiply
    520,680.78x = 718,327.44 × 339,326.64
  4. Step 4: Simplify right side
    520,680.78x = 243,747,636,635.00
  5. Step 5: Solve for x
    x = 243,747,636,635.00/520,680.78
  6. Step 6: Final answer
    x = 468,132.58

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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.