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Finding the Fourth Proportional to 455,385.60, 683,272.80 and 218,606.40

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Solution

The fourth proportional to 455,385.60, 683,272.80 and 218,606.40 is: 328,002.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,385.60 : 683,272.80 = 218,606.40 : x
  2. Step 2: Convert to fraction form
    455,385.60/683,272.80 = 218,606.40/x
  3. Step 3: Cross multiply
    455,385.60x = 683,272.80 × 218,606.40
  4. Step 4: Simplify right side
    455,385.60x = 149,367,807,025.92
  5. Step 5: Solve for x
    x = 149,367,807,025.92/455,385.60
  6. Step 6: Final answer
    x = 328,002.92

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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.