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Finding the Fourth Proportional to 455,420.60, 683,325.30 and 218,641.40

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Solution

The fourth proportional to 455,420.60, 683,325.30 and 218,641.40 is: 328,055.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,420.60 : 683,325.30 = 218,641.40 : x
  2. Step 2: Convert to fraction form
    455,420.60/683,325.30 = 218,641.40/x
  3. Step 3: Cross multiply
    455,420.60x = 683,325.30 × 218,641.40
  4. Step 4: Simplify right side
    455,420.60x = 149,403,200,247.42
  5. Step 5: Solve for x
    x = 149,403,200,247.42/455,420.60
  6. Step 6: Final answer
    x = 328,055.43

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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.