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Finding the Fourth Proportional to 630,434.80, 945,738.60 and 209,666.80

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Solution

The fourth proportional to 630,434.80, 945,738.60 and 209,666.80 is: 314,528.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,434.80 : 945,738.60 = 209,666.80 : x
  2. Step 2: Convert to fraction form
    630,434.80/945,738.60 = 209,666.80/x
  3. Step 3: Cross multiply
    630,434.80x = 945,738.60 × 209,666.80
  4. Step 4: Simplify right side
    630,434.80x = 198,289,985,898.48
  5. Step 5: Solve for x
    x = 198,289,985,898.48/630,434.80
  6. Step 6: Final answer
    x = 314,528.93

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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.