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Finding the Fourth Proportional to 616,310.76, 850,620.42 and 398,787.24

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Solution

The fourth proportional to 616,310.76, 850,620.42 and 398,787.24 is: 550,398.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    616,310.76 : 850,620.42 = 398,787.24 : x
  2. Step 2: Convert to fraction form
    616,310.76/850,620.42 = 398,787.24/x
  3. Step 3: Cross multiply
    616,310.76x = 850,620.42 × 398,787.24
  4. Step 4: Simplify right side
    616,310.76x = 339,216,569,579.44
  5. Step 5: Solve for x
    x = 339,216,569,579.44/616,310.76
  6. Step 6: Final answer
    x = 550,398.58

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Double scale
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1.5x scale

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.