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Finding the Fourth Proportional to 605,745.30, 907,633.80 and 521,108.40

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Solution

The fourth proportional to 605,745.30, 907,633.80 and 521,108.40 is: 780,815.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,745.30 : 907,633.80 = 521,108.40 : x
  2. Step 2: Convert to fraction form
    605,745.30/907,633.80 = 521,108.40/x
  3. Step 3: Cross multiply
    605,745.30x = 907,633.80 × 521,108.40
  4. Step 4: Simplify right side
    605,745.30x = 472,975,597,303.92
  5. Step 5: Solve for x
    x = 472,975,597,303.92/605,745.30
  6. Step 6: Final answer
    x = 780,815.96

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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.