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Finding the Fourth Proportional to 285,329.40, 427,961.70 and 74,988.60

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Solution

The fourth proportional to 285,329.40, 427,961.70 and 74,988.60 is: 112,474.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,329.40 : 427,961.70 = 74,988.60 : x
  2. Step 2: Convert to fraction form
    285,329.40/427,961.70 = 74,988.60/x
  3. Step 3: Cross multiply
    285,329.40x = 427,961.70 × 74,988.60
  4. Step 4: Simplify right side
    285,329.40x = 32,092,248,736.62
  5. Step 5: Solve for x
    x = 32,092,248,736.62/285,329.40
  6. Step 6: Final answer
    x = 112,474.38

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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.