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Finding the Fourth Proportional to 621,900, 932,812.92 and 365,876.40

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Solution

The fourth proportional to 621,900, 932,812.92 and 365,876.40 is: 548,792.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,900 : 932,812.92 = 365,876.40 : x
  2. Step 2: Convert to fraction form
    621,900/932,812.92 = 365,876.40/x
  3. Step 3: Cross multiply
    621,900x = 932,812.92 × 365,876.40
  4. Step 4: Simplify right side
    621,900x = 341,294,233,043.09
  5. Step 5: Solve for x
    x = 341,294,233,043.09/621,900
  6. Step 6: Final answer
    x = 548,792.79

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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.