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Finding the Fourth Proportional to 216,570.77, 324,638 and 90,280.88

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Solution

The fourth proportional to 216,570.77, 324,638 and 90,280.88 is: 135,330.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,570.77 : 324,638 = 90,280.88 : x
  2. Step 2: Convert to fraction form
    216,570.77/324,638 = 90,280.88/x
  3. Step 3: Cross multiply
    216,570.77x = 324,638 × 90,280.88
  4. Step 4: Simplify right side
    216,570.77x = 29,308,604,321.44
  5. Step 5: Solve for x
    x = 29,308,604,321.44/216,570.77
  6. Step 6: Final answer
    x = 135,330.38

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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.