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Finding the Fourth Proportional to 611,624.40, 917,436.60 and 212,132.40

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Solution

The fourth proportional to 611,624.40, 917,436.60 and 212,132.40 is: 318,198.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,624.40 : 917,436.60 = 212,132.40 : x
  2. Step 2: Convert to fraction form
    611,624.40/917,436.60 = 212,132.40/x
  3. Step 3: Cross multiply
    611,624.40x = 917,436.60 × 212,132.40
  4. Step 4: Simplify right side
    611,624.40x = 194,618,027,805.84
  5. Step 5: Solve for x
    x = 194,618,027,805.84/611,624.40
  6. Step 6: Final answer
    x = 318,198.60

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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.