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Finding the Fourth Proportional to 383,285.50, 528,650.64 and 281,276.50

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Solution

The fourth proportional to 383,285.50, 528,650.64 and 281,276.50 is: 387,953.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,285.50 : 528,650.64 = 281,276.50 : x
  2. Step 2: Convert to fraction form
    383,285.50/528,650.64 = 281,276.50/x
  3. Step 3: Cross multiply
    383,285.50x = 528,650.64 × 281,276.50
  4. Step 4: Simplify right side
    383,285.50x = 148,697,001,741.96
  5. Step 5: Solve for x
    x = 148,697,001,741.96/383,285.50
  6. Step 6: Final answer
    x = 387,953.63

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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.