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Finding the Fourth Proportional to 218,323.40, 327,657.90 and 85,267.40

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Solution

The fourth proportional to 218,323.40, 327,657.90 and 85,267.40 is: 127,968.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,323.40 : 327,657.90 = 85,267.40 : x
  2. Step 2: Convert to fraction form
    218,323.40/327,657.90 = 85,267.40/x
  3. Step 3: Cross multiply
    218,323.40x = 327,657.90 × 85,267.40
  4. Step 4: Simplify right side
    218,323.40x = 27,938,537,222.46
  5. Step 5: Solve for x
    x = 27,938,537,222.46/218,323.40
  6. Step 6: Final answer
    x = 127,968.59

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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.