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Finding the Fourth Proportional to 631,431.40, 947,147.10 and 365,054.80

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Solution

The fourth proportional to 631,431.40, 947,147.10 and 365,054.80 is: 547,582.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,431.40 : 947,147.10 = 365,054.80 : x
  2. Step 2: Convert to fraction form
    631,431.40/947,147.10 = 365,054.80/x
  3. Step 3: Cross multiply
    631,431.40x = 947,147.10 × 365,054.80
  4. Step 4: Simplify right side
    631,431.40x = 345,760,595,161.08
  5. Step 5: Solve for x
    x = 345,760,595,161.08/631,431.40
  6. Step 6: Final answer
    x = 547,582.20

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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.