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Finding the Fourth Proportional to 630,146.80, 945,306.60 and 209,378.80

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Solution

The fourth proportional to 630,146.80, 945,306.60 and 209,378.80 is: 314,096.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,146.80 : 945,306.60 = 209,378.80 : x
  2. Step 2: Convert to fraction form
    630,146.80/945,306.60 = 209,378.80/x
  3. Step 3: Cross multiply
    630,146.80x = 945,306.60 × 209,378.80
  4. Step 4: Simplify right side
    630,146.80x = 197,927,161,540.08
  5. Step 5: Solve for x
    x = 197,927,161,540.08/630,146.80
  6. Step 6: Final answer
    x = 314,096.91

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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.