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Finding the Fourth Proportional to 455,902.80, 683,854.20 and 123,478.80

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Solution

The fourth proportional to 455,902.80, 683,854.20 and 123,478.80 is: 185,218.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,902.80 : 683,854.20 = 123,478.80 : x
  2. Step 2: Convert to fraction form
    455,902.80/683,854.20 = 123,478.80/x
  3. Step 3: Cross multiply
    455,902.80x = 683,854.20 × 123,478.80
  4. Step 4: Simplify right side
    455,902.80x = 84,441,495,990.96
  5. Step 5: Solve for x
    x = 84,441,495,990.96/455,902.80
  6. Step 6: Final answer
    x = 185,218.20

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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.