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Finding the Fourth Proportional to 518,910.30, 778,474.80 and 163,960.20

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Solution

The fourth proportional to 518,910.30, 778,474.80 and 163,960.20 is: 245,974.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,910.30 : 778,474.80 = 163,960.20 : x
  2. Step 2: Convert to fraction form
    518,910.30/778,474.80 = 163,960.20/x
  3. Step 3: Cross multiply
    518,910.30x = 778,474.80 × 163,960.20
  4. Step 4: Simplify right side
    518,910.30x = 127,638,883,902.96
  5. Step 5: Solve for x
    x = 127,638,883,902.96/518,910.30
  6. Step 6: Final answer
    x = 245,974.85

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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.