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Finding the Fourth Proportional to 518,797.40, 778,346.46 and 215,135.15

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Solution

The fourth proportional to 518,797.40, 778,346.46 and 215,135.15 is: 322,765.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,797.40 : 778,346.46 = 215,135.15 : x
  2. Step 2: Convert to fraction form
    518,797.40/778,346.46 = 215,135.15/x
  3. Step 3: Cross multiply
    518,797.40x = 778,346.46 × 215,135.15
  4. Step 4: Simplify right side
    518,797.40x = 167,449,678,532.34
  5. Step 5: Solve for x
    x = 167,449,678,532.34/518,797.40
  6. Step 6: Final answer
    x = 322,765.07

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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.