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Finding the Fourth Proportional to 398,609.10, 597,913.65 and 211,985.10

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Solution

The fourth proportional to 398,609.10, 597,913.65 and 211,985.10 is: 317,977.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,609.10 : 597,913.65 = 211,985.10 : x
  2. Step 2: Convert to fraction form
    398,609.10/597,913.65 = 211,985.10/x
  3. Step 3: Cross multiply
    398,609.10x = 597,913.65 × 211,985.10
  4. Step 4: Simplify right side
    398,609.10x = 126,748,784,886.62
  5. Step 5: Solve for x
    x = 126,748,784,886.62/398,609.10
  6. Step 6: Final answer
    x = 317,977.65

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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.