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Finding the Fourth Proportional to 455,496.60, 683,244.90 and 421,282.20

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Solution

The fourth proportional to 455,496.60, 683,244.90 and 421,282.20 is: 631,923.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,496.60 : 683,244.90 = 421,282.20 : x
  2. Step 2: Convert to fraction form
    455,496.60/683,244.90 = 421,282.20/x
  3. Step 3: Cross multiply
    455,496.60x = 683,244.90 × 421,282.20
  4. Step 4: Simplify right side
    455,496.60x = 287,838,914,610.78
  5. Step 5: Solve for x
    x = 287,838,914,610.78/455,496.60
  6. Step 6: Final answer
    x = 631,923.30

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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.