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Finding the Fourth Proportional to 309,728.48, 426,972.87 and 218,924.24

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Solution

The fourth proportional to 309,728.48, 426,972.87 and 218,924.24 is: 301,795.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,728.48 : 426,972.87 = 218,924.24 : x
  2. Step 2: Convert to fraction form
    309,728.48/426,972.87 = 218,924.24/x
  3. Step 3: Cross multiply
    309,728.48x = 426,972.87 × 218,924.24
  4. Step 4: Simplify right side
    309,728.48x = 93,474,708,930.50
  5. Step 5: Solve for x
    x = 93,474,708,930.50/309,728.48
  6. Step 6: Final answer
    x = 301,795.66

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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.