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Finding the Fourth Proportional to 867,662.60, 1,301,493.90 and 512,493.80

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Solution

The fourth proportional to 867,662.60, 1,301,493.90 and 512,493.80 is: 768,740.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    867,662.60 : 1,301,493.90 = 512,493.80 : x
  2. Step 2: Convert to fraction form
    867,662.60/1,301,493.90 = 512,493.80/x
  3. Step 3: Cross multiply
    867,662.60x = 1,301,493.90 × 512,493.80
  4. Step 4: Simplify right side
    867,662.60x = 667,007,554,487.82
  5. Step 5: Solve for x
    x = 667,007,554,487.82/867,662.60
  6. Step 6: Final answer
    x = 768,740.70

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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.