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Finding the Fourth Proportional to 281,372.55, 388,331.09 and 160,486.12

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Solution

The fourth proportional to 281,372.55, 388,331.09 and 160,486.12 is: 221,491.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,372.55 : 388,331.09 = 160,486.12 : x
  2. Step 2: Convert to fraction form
    281,372.55/388,331.09 = 160,486.12/x
  3. Step 3: Cross multiply
    281,372.55x = 388,331.09 × 160,486.12
  4. Step 4: Simplify right side
    281,372.55x = 62,321,749,909.47
  5. Step 5: Solve for x
    x = 62,321,749,909.47/281,372.55
  6. Step 6: Final answer
    x = 221,491.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.