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Finding the Fourth Proportional to 605,622.40, 910,401.90 and 519,017.20

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Solution

The fourth proportional to 605,622.40, 910,401.90 and 519,017.20 is: 780,212.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,622.40 : 910,401.90 = 519,017.20 : x
  2. Step 2: Convert to fraction form
    605,622.40/910,401.90 = 519,017.20/x
  3. Step 3: Cross multiply
    605,622.40x = 910,401.90 × 519,017.20
  4. Step 4: Simplify right side
    605,622.40x = 472,514,245,012.68
  5. Step 5: Solve for x
    x = 472,514,245,012.68/605,622.40
  6. Step 6: Final answer
    x = 780,212.63

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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.