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Finding the Fourth Proportional to 612,194.20, 918,291.30 and 442,920.40

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Solution

The fourth proportional to 612,194.20, 918,291.30 and 442,920.40 is: 664,380.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,194.20 : 918,291.30 = 442,920.40 : x
  2. Step 2: Convert to fraction form
    612,194.20/918,291.30 = 442,920.40/x
  3. Step 3: Cross multiply
    612,194.20x = 918,291.30 × 442,920.40
  4. Step 4: Simplify right side
    612,194.20x = 406,729,949,912.52
  5. Step 5: Solve for x
    x = 406,729,949,912.52/612,194.20
  6. Step 6: Final answer
    x = 664,380.60

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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.