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Finding the Fourth Proportional to 603,871.40, 905,807.10 and 404,805.80

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Solution

The fourth proportional to 603,871.40, 905,807.10 and 404,805.80 is: 607,208.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,871.40 : 905,807.10 = 404,805.80 : x
  2. Step 2: Convert to fraction form
    603,871.40/905,807.10 = 404,805.80/x
  3. Step 3: Cross multiply
    603,871.40x = 905,807.10 × 404,805.80
  4. Step 4: Simplify right side
    603,871.40x = 366,675,967,761.18
  5. Step 5: Solve for x
    x = 366,675,967,761.18/603,871.40
  6. Step 6: Final answer
    x = 607,208.70

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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.