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Finding the Fourth Proportional to 243,012.70, 364,519.05 and 218,518.30

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Solution

The fourth proportional to 243,012.70, 364,519.05 and 218,518.30 is: 327,777.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,012.70 : 364,519.05 = 218,518.30 : x
  2. Step 2: Convert to fraction form
    243,012.70/364,519.05 = 218,518.30/x
  3. Step 3: Cross multiply
    243,012.70x = 364,519.05 × 218,518.30
  4. Step 4: Simplify right side
    243,012.70x = 79,654,083,123.62
  5. Step 5: Solve for x
    x = 79,654,083,123.62/243,012.70
  6. Step 6: Final answer
    x = 327,777.45

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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.