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Finding the Fourth Proportional to 383,130.72, 528,715.62 and 211,045.14

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Solution

The fourth proportional to 383,130.72, 528,715.62 and 211,045.14 is: 291,239.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,130.72 : 528,715.62 = 211,045.14 : x
  2. Step 2: Convert to fraction form
    383,130.72/528,715.62 = 211,045.14/x
  3. Step 3: Cross multiply
    383,130.72x = 528,715.62 × 211,045.14
  4. Step 4: Simplify right side
    383,130.72x = 111,582,862,043.09
  5. Step 5: Solve for x
    x = 111,582,862,043.09/383,130.72
  6. Step 6: Final answer
    x = 291,239.66

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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.