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Finding the Fourth Proportional to 653,453.20, 980,179.80 and 429,504.40

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Solution

The fourth proportional to 653,453.20, 980,179.80 and 429,504.40 is: 644,256.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    653,453.20 : 980,179.80 = 429,504.40 : x
  2. Step 2: Convert to fraction form
    653,453.20/980,179.80 = 429,504.40/x
  3. Step 3: Cross multiply
    653,453.20x = 980,179.80 × 429,504.40
  4. Step 4: Simplify right side
    653,453.20x = 420,991,536,891.12
  5. Step 5: Solve for x
    x = 420,991,536,891.12/653,453.20
  6. Step 6: Final answer
    x = 644,256.60

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Double scale
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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.