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Finding the Fourth Proportional to 519,787.15, 717,308.77 and 290,354.11

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Solution

The fourth proportional to 519,787.15, 717,308.77 and 290,354.11 is: 400,690.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,787.15 : 717,308.77 = 290,354.11 : x
  2. Step 2: Convert to fraction form
    519,787.15/717,308.77 = 290,354.11/x
  3. Step 3: Cross multiply
    519,787.15x = 717,308.77 × 290,354.11
  4. Step 4: Simplify right side
    519,787.15x = 208,273,549,508.55
  5. Step 5: Solve for x
    x = 208,273,549,508.55/519,787.15
  6. Step 6: Final answer
    x = 400,690.07

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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.