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Finding the Fourth Proportional to 630,135.80, 945,290.10 and 209,367.80

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Solution

The fourth proportional to 630,135.80, 945,290.10 and 209,367.80 is: 314,080.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,135.80 : 945,290.10 = 209,367.80 : x
  2. Step 2: Convert to fraction form
    630,135.80/945,290.10 = 209,367.80/x
  3. Step 3: Cross multiply
    630,135.80x = 945,290.10 × 209,367.80
  4. Step 4: Simplify right side
    630,135.80x = 197,913,308,598.78
  5. Step 5: Solve for x
    x = 197,913,308,598.78/630,135.80
  6. Step 6: Final answer
    x = 314,080.41

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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.