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Finding the Fourth Proportional to 699,979.92, 965,963.88 and 398,173.20

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Solution

The fourth proportional to 699,979.92, 965,963.88 and 398,173.20 is: 549,474.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,979.92 : 965,963.88 = 398,173.20 : x
  2. Step 2: Convert to fraction form
    699,979.92/965,963.88 = 398,173.20/x
  3. Step 3: Cross multiply
    699,979.92x = 965,963.88 × 398,173.20
  4. Step 4: Simplify right side
    699,979.92x = 384,620,929,184.02
  5. Step 5: Solve for x
    x = 384,620,929,184.02/699,979.92
  6. Step 6: Final answer
    x = 549,474.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.