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Finding the Fourth Proportional to 405,227.40, 607,039.20 and 355,363.80

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Solution

The fourth proportional to 405,227.40, 607,039.20 and 355,363.80 is: 532,342.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,227.40 : 607,039.20 = 355,363.80 : x
  2. Step 2: Convert to fraction form
    405,227.40/607,039.20 = 355,363.80/x
  3. Step 3: Cross multiply
    405,227.40x = 607,039.20 × 355,363.80
  4. Step 4: Simplify right side
    405,227.40x = 215,719,756,860.96
  5. Step 5: Solve for x
    x = 215,719,756,860.96/405,227.40
  6. Step 6: Final answer
    x = 532,342.47

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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.