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Finding the Fourth Proportional to 404,320.20, 606,480.30 and 399,071.40

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Solution

The fourth proportional to 404,320.20, 606,480.30 and 399,071.40 is: 598,607.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,320.20 : 606,480.30 = 399,071.40 : x
  2. Step 2: Convert to fraction form
    404,320.20/606,480.30 = 399,071.40/x
  3. Step 3: Cross multiply
    404,320.20x = 606,480.30 × 399,071.40
  4. Step 4: Simplify right side
    404,320.20x = 242,028,942,393.42
  5. Step 5: Solve for x
    x = 242,028,942,393.42/404,320.20
  6. Step 6: Final answer
    x = 598,607.10

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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.