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Finding the Fourth Proportional to 630,216.60, 945,324.90 and 209,437.80

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Solution

The fourth proportional to 630,216.60, 945,324.90 and 209,437.80 is: 314,156.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,216.60 : 945,324.90 = 209,437.80 : x
  2. Step 2: Convert to fraction form
    630,216.60/945,324.90 = 209,437.80/x
  3. Step 3: Cross multiply
    630,216.60x = 945,324.90 × 209,437.80
  4. Step 4: Simplify right side
    630,216.60x = 197,986,767,341.22
  5. Step 5: Solve for x
    x = 197,986,767,341.22/630,216.60
  6. Step 6: Final answer
    x = 314,156.70

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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.