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Finding the Fourth Proportional to 383,356.50, 529,035.55 and 211,280.61

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Solution

The fourth proportional to 383,356.50, 529,035.55 and 211,280.61 is: 291,569.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,356.50 : 529,035.55 = 211,280.61 : x
  2. Step 2: Convert to fraction form
    383,356.50/529,035.55 = 211,280.61/x
  3. Step 3: Cross multiply
    383,356.50x = 529,035.55 × 211,280.61
  4. Step 4: Simplify right side
    383,356.50x = 111,774,954,871.91
  5. Step 5: Solve for x
    x = 111,774,954,871.91/383,356.50
  6. Step 6: Final answer
    x = 291,569.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.