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Finding the Fourth Proportional to 404,381.20, 606,717.60 and 389,801.20

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Solution

The fourth proportional to 404,381.20, 606,717.60 and 389,801.20 is: 584,842.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,381.20 : 606,717.60 = 389,801.20 : x
  2. Step 2: Convert to fraction form
    404,381.20/606,717.60 = 389,801.20/x
  3. Step 3: Cross multiply
    404,381.20x = 606,717.60 × 389,801.20
  4. Step 4: Simplify right side
    404,381.20x = 236,499,248,541.12
  5. Step 5: Solve for x
    x = 236,499,248,541.12/404,381.20
  6. Step 6: Final answer
    x = 584,842.34

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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.