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Finding the Fourth Proportional to 548,420.20, 822,630.30 and 478,436.20

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Solution

The fourth proportional to 548,420.20, 822,630.30 and 478,436.20 is: 717,654.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,420.20 : 822,630.30 = 478,436.20 : x
  2. Step 2: Convert to fraction form
    548,420.20/822,630.30 = 478,436.20/x
  3. Step 3: Cross multiply
    548,420.20x = 822,630.30 × 478,436.20
  4. Step 4: Simplify right side
    548,420.20x = 393,576,114,736.86
  5. Step 5: Solve for x
    x = 393,576,114,736.86/548,420.20
  6. Step 6: Final answer
    x = 717,654.30

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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.