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Finding the Fourth Proportional to 518,905.70, 778,358.55 and 494,411.30

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Solution

The fourth proportional to 518,905.70, 778,358.55 and 494,411.30 is: 741,616.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,905.70 : 778,358.55 = 494,411.30 : x
  2. Step 2: Convert to fraction form
    518,905.70/778,358.55 = 494,411.30/x
  3. Step 3: Cross multiply
    518,905.70x = 778,358.55 × 494,411.30
  4. Step 4: Simplify right side
    518,905.70x = 384,829,262,571.62
  5. Step 5: Solve for x
    x = 384,829,262,571.62/518,905.70
  6. Step 6: Final answer
    x = 741,616.95

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Similar ratio
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1.5x scale

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.