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Finding the Fourth Proportional to 548,287.40, 822,431.10 and 415,427.15

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Solution

The fourth proportional to 548,287.40, 822,431.10 and 415,427.15 is: 623,140.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,287.40 : 822,431.10 = 415,427.15 : x
  2. Step 2: Convert to fraction form
    548,287.40/822,431.10 = 415,427.15/x
  3. Step 3: Cross multiply
    548,287.40x = 822,431.10 × 415,427.15
  4. Step 4: Simplify right side
    548,287.40x = 341,660,207,944.37
  5. Step 5: Solve for x
    x = 341,660,207,944.37/548,287.40
  6. Step 6: Final answer
    x = 623,140.73

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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.