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Finding the Fourth Proportional to 455,715.20, 683,572.80 and 243,138.80

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Solution

The fourth proportional to 455,715.20, 683,572.80 and 243,138.80 is: 364,708.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,715.20 : 683,572.80 = 243,138.80 : x
  2. Step 2: Convert to fraction form
    455,715.20/683,572.80 = 243,138.80/x
  3. Step 3: Cross multiply
    455,715.20x = 683,572.80 × 243,138.80
  4. Step 4: Simplify right side
    455,715.20x = 166,203,070,304.64
  5. Step 5: Solve for x
    x = 166,203,070,304.64/455,715.20
  6. Step 6: Final answer
    x = 364,708.20

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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.