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Finding the Fourth Proportional to 856,408.60, 1,284,612.90 and 803,920.60

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Solution

The fourth proportional to 856,408.60, 1,284,612.90 and 803,920.60 is: 1,205,880.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    856,408.60 : 1,284,612.90 = 803,920.60 : x
  2. Step 2: Convert to fraction form
    856,408.60/1,284,612.90 = 803,920.60/x
  3. Step 3: Cross multiply
    856,408.60x = 1,284,612.90 × 803,920.60
  4. Step 4: Simplify right side
    856,408.60x = 1,032,726,773,335.74
  5. Step 5: Solve for x
    x = 1,032,726,773,335.74/856,408.60
  6. Step 6: Final answer
    x = 1,205,880.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.