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Finding the Fourth Proportional to 243,013.70, 364,520.55 and 217,425.80

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Solution

The fourth proportional to 243,013.70, 364,520.55 and 217,425.80 is: 326,138.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,013.70 : 364,520.55 = 217,425.80 : x
  2. Step 2: Convert to fraction form
    243,013.70/364,520.55 = 217,425.80/x
  3. Step 3: Cross multiply
    243,013.70x = 364,520.55 × 217,425.80
  4. Step 4: Simplify right side
    243,013.70x = 79,256,172,200.19
  5. Step 5: Solve for x
    x = 79,256,172,200.19/243,013.70
  6. Step 6: Final answer
    x = 326,138.70

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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.