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Finding the Fourth Proportional to 611,715, 917,572.50 and 168,483

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Solution

The fourth proportional to 611,715, 917,572.50 and 168,483 is: 252,724.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,715 : 917,572.50 = 168,483 : x
  2. Step 2: Convert to fraction form
    611,715/917,572.50 = 168,483/x
  3. Step 3: Cross multiply
    611,715x = 917,572.50 × 168,483
  4. Step 4: Simplify right side
    611,715x = 154,595,367,517.50
  5. Step 5: Solve for x
    x = 154,595,367,517.50/611,715
  6. Step 6: Final answer
    x = 252,724.50

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Similar ratio
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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.