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Finding the Fourth Proportional to 519,802.45, 778,899.99 and 405,679.67

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Solution

The fourth proportional to 519,802.45, 778,899.99 and 405,679.67 is: 607,892.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,802.45 : 778,899.99 = 405,679.67 : x
  2. Step 2: Convert to fraction form
    519,802.45/778,899.99 = 405,679.67/x
  3. Step 3: Cross multiply
    519,802.45x = 778,899.99 × 405,679.67
  4. Step 4: Simplify right side
    519,802.45x = 315,983,887,011.70
  5. Step 5: Solve for x
    x = 315,983,887,011.70/519,802.45
  6. Step 6: Final answer
    x = 607,892.26

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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.