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Finding the Fourth Proportional to 605,742.80, 907,630.05 and 521,105.90

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Solution

The fourth proportional to 605,742.80, 907,630.05 and 521,105.90 is: 780,812.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,742.80 : 907,630.05 = 521,105.90 : x
  2. Step 2: Convert to fraction form
    605,742.80/907,630.05 = 521,105.90/x
  3. Step 3: Cross multiply
    605,742.80x = 907,630.05 × 521,105.90
  4. Step 4: Simplify right side
    605,742.80x = 472,971,374,072.30
  5. Step 5: Solve for x
    x = 472,971,374,072.30/605,742.80
  6. Step 6: Final answer
    x = 780,812.21

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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.