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Finding the Fourth Proportional to 309,365.53, 426,125.85 and 218,563.87

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Solution

The fourth proportional to 309,365.53, 426,125.85 and 218,563.87 is: 301,053.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,365.53 : 426,125.85 = 218,563.87 : x
  2. Step 2: Convert to fraction form
    309,365.53/426,125.85 = 218,563.87/x
  3. Step 3: Cross multiply
    309,365.53x = 426,125.85 × 218,563.87
  4. Step 4: Simplify right side
    309,365.53x = 93,135,714,883.04
  5. Step 5: Solve for x
    x = 93,135,714,883.04/309,365.53
  6. Step 6: Final answer
    x = 301,053.95

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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.