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Finding the Fourth Proportional to 437,603.40, 656,405.10 and 138,107.34

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Solution

The fourth proportional to 437,603.40, 656,405.10 and 138,107.34 is: 207,161.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,603.40 : 656,405.10 = 138,107.34 : x
  2. Step 2: Convert to fraction form
    437,603.40/656,405.10 = 138,107.34/x
  3. Step 3: Cross multiply
    437,603.40x = 656,405.10 × 138,107.34
  4. Step 4: Simplify right side
    437,603.40x = 90,654,362,323.43
  5. Step 5: Solve for x
    x = 90,654,362,323.43/437,603.40
  6. Step 6: Final answer
    x = 207,161.01

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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.