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Finding the Fourth Proportional to 400,410.78, 552,566.88 and 219,122.70

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Solution

The fourth proportional to 400,410.78, 552,566.88 and 219,122.70 is: 302,389.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,410.78 : 552,566.88 = 219,122.70 : x
  2. Step 2: Convert to fraction form
    400,410.78/552,566.88 = 219,122.70/x
  3. Step 3: Cross multiply
    400,410.78x = 552,566.88 × 219,122.70
  4. Step 4: Simplify right side
    400,410.78x = 121,079,946,676.18
  5. Step 5: Solve for x
    x = 121,079,946,676.18/400,410.78
  6. Step 6: Final answer
    x = 302,389.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.