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Finding the Fourth Proportional to 630,522.40, 945,783.60 and 209,840.80

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Solution

The fourth proportional to 630,522.40, 945,783.60 and 209,840.80 is: 314,761.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,522.40 : 945,783.60 = 209,840.80 : x
  2. Step 2: Convert to fraction form
    630,522.40/945,783.60 = 209,840.80/x
  3. Step 3: Cross multiply
    630,522.40x = 945,783.60 × 209,840.80
  4. Step 4: Simplify right side
    630,522.40x = 198,463,987,250.88
  5. Step 5: Solve for x
    x = 198,463,987,250.88/630,522.40
  6. Step 6: Final answer
    x = 314,761.20

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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.