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Finding the Fourth Proportional to 661,504.60, 992,256.90 and 425,308.60

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Solution

The fourth proportional to 661,504.60, 992,256.90 and 425,308.60 is: 637,962.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,504.60 : 992,256.90 = 425,308.60 : x
  2. Step 2: Convert to fraction form
    661,504.60/992,256.90 = 425,308.60/x
  3. Step 3: Cross multiply
    661,504.60x = 992,256.90 × 425,308.60
  4. Step 4: Simplify right side
    661,504.60x = 422,015,392,979.34
  5. Step 5: Solve for x
    x = 422,015,392,979.34/661,504.60
  6. Step 6: Final answer
    x = 637,962.90

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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.