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Finding the Fourth Proportional to 309,658.01, 464,487.74 and 85,021.52

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Solution

The fourth proportional to 309,658.01, 464,487.74 and 85,021.52 is: 127,532.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,658.01 : 464,487.74 = 85,021.52 : x
  2. Step 2: Convert to fraction form
    309,658.01/464,487.74 = 85,021.52/x
  3. Step 3: Cross multiply
    309,658.01x = 464,487.74 × 85,021.52
  4. Step 4: Simplify right side
    309,658.01x = 39,491,450,928.62
  5. Step 5: Solve for x
    x = 39,491,450,928.62/309,658.01
  6. Step 6: Final answer
    x = 127,532.47

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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.