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Finding the Fourth Proportional to 615,847.40, 923,771.10 and 491,431.40

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Solution

The fourth proportional to 615,847.40, 923,771.10 and 491,431.40 is: 737,147.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,847.40 : 923,771.10 = 491,431.40 : x
  2. Step 2: Convert to fraction form
    615,847.40/923,771.10 = 491,431.40/x
  3. Step 3: Cross multiply
    615,847.40x = 923,771.10 × 491,431.40
  4. Step 4: Simplify right side
    615,847.40x = 453,970,124,952.54
  5. Step 5: Solve for x
    x = 453,970,124,952.54/615,847.40
  6. Step 6: Final answer
    x = 737,147.10

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Half scale
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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.