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Finding the Fourth Proportional to 455,920.40, 683,880.60 and 434,147.60

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Solution

The fourth proportional to 455,920.40, 683,880.60 and 434,147.60 is: 651,221.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,920.40 : 683,880.60 = 434,147.60 : x
  2. Step 2: Convert to fraction form
    455,920.40/683,880.60 = 434,147.60/x
  3. Step 3: Cross multiply
    455,920.40x = 683,880.60 × 434,147.60
  4. Step 4: Simplify right side
    455,920.40x = 296,905,121,176.56
  5. Step 5: Solve for x
    x = 296,905,121,176.56/455,920.40
  6. Step 6: Final answer
    x = 651,221.40

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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.