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Finding the Fourth Proportional to 455,984.67, 683,975.64 and 320,490.91

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Solution

The fourth proportional to 455,984.67, 683,975.64 and 320,490.91 is: 480,735.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,984.67 : 683,975.64 = 320,490.91 : x
  2. Step 2: Convert to fraction form
    455,984.67/683,975.64 = 320,490.91/x
  3. Step 3: Cross multiply
    455,984.67x = 683,975.64 × 320,490.91
  4. Step 4: Simplify right side
    455,984.67x = 219,207,977,338.24
  5. Step 5: Solve for x
    x = 219,207,977,338.24/455,984.67
  6. Step 6: Final answer
    x = 480,735.41

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1.5x scale

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.