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Finding the Fourth Proportional to 383,062.47, 528,621.21 and 210,977.16

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Solution

The fourth proportional to 383,062.47, 528,621.21 and 210,977.16 is: 291,145.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,062.47 : 528,621.21 = 210,977.16 : x
  2. Step 2: Convert to fraction form
    383,062.47/528,621.21 = 210,977.16/x
  3. Step 3: Cross multiply
    383,062.47x = 528,621.21 × 210,977.16
  4. Step 4: Simplify right side
    383,062.47x = 111,527,001,601.56
  5. Step 5: Solve for x
    x = 111,527,001,601.56/383,062.47
  6. Step 6: Final answer
    x = 291,145.73

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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.