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Finding the Fourth Proportional to 393,603.30, 590,260.50 and 140,815.26

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Solution

The fourth proportional to 393,603.30, 590,260.50 and 140,815.26 is: 211,171.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,603.30 : 590,260.50 = 140,815.26 : x
  2. Step 2: Convert to fraction form
    393,603.30/590,260.50 = 140,815.26/x
  3. Step 3: Cross multiply
    393,603.30x = 590,260.50 × 140,815.26
  4. Step 4: Simplify right side
    393,603.30x = 83,117,685,775.23
  5. Step 5: Solve for x
    x = 83,117,685,775.23/393,603.30
  6. Step 6: Final answer
    x = 211,171.21

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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.