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Finding the Fourth Proportional to 404,813.70, 607,220.55 and 398,908.80

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Solution

The fourth proportional to 404,813.70, 607,220.55 and 398,908.80 is: 598,363.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,813.70 : 607,220.55 = 398,908.80 : x
  2. Step 2: Convert to fraction form
    404,813.70/607,220.55 = 398,908.80/x
  3. Step 3: Cross multiply
    404,813.70x = 607,220.55 × 398,908.80
  4. Step 4: Simplify right side
    404,813.70x = 242,225,620,935.84
  5. Step 5: Solve for x
    x = 242,225,620,935.84/404,813.70
  6. Step 6: Final answer
    x = 598,363.20

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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.