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Finding the Fourth Proportional to 603,979.40, 905,969.10 and 404,913.80

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Solution

The fourth proportional to 603,979.40, 905,969.10 and 404,913.80 is: 607,370.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,979.40 : 905,969.10 = 404,913.80 : x
  2. Step 2: Convert to fraction form
    603,979.40/905,969.10 = 404,913.80/x
  3. Step 3: Cross multiply
    603,979.40x = 905,969.10 × 404,913.80
  4. Step 4: Simplify right side
    603,979.40x = 366,839,390,963.58
  5. Step 5: Solve for x
    x = 366,839,390,963.58/603,979.40
  6. Step 6: Final answer
    x = 607,370.70

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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.