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Finding the Fourth Proportional to 383,146.43, 528,721.29 and 211,030.90

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Solution

The fourth proportional to 383,146.43, 528,721.29 and 211,030.90 is: 291,211.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,146.43 : 528,721.29 = 211,030.90 : x
  2. Step 2: Convert to fraction form
    383,146.43/528,721.29 = 211,030.90/x
  3. Step 3: Cross multiply
    383,146.43x = 528,721.29 × 211,030.90
  4. Step 4: Simplify right side
    383,146.43x = 111,576,528,356.06
  5. Step 5: Solve for x
    x = 111,576,528,356.06/383,146.43
  6. Step 6: Final answer
    x = 291,211.20

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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.